On 5 May 1859, governor Don Ignacio Pesqueira — in representation of the now FREE AND SOVEREIGN STATE OF SONORA AND THE PROVISIONAL OF SINALOA — commissioned the Mint of Culiacán to produce 1,066,667 Sonora cuartillas (¼th of a real) and 1,066,667 Sonora octavos (⅛th of a real){footnote}Alberto Francisco Pradeau, Historia Numismática de México de 1823 a 1950. Tomo Segundo. Cecas de: Hermosillo, Alamos, Catorce, Chihuahua, Culiacán y Durango, Sociedad Numismática de México, México, 1960; Alberto Francisco Pradeau, Sonora y sus Casas de Moneda, Alamos y Hermosillo, Gobierno del Estado de Sonora. Hermosillo, 1983{/footnote}. This novel coinage was to weigh theoretically half an ounce the cuartilla (14.375gr) and 7.188gr for the octavo. Today, surviving specimens of these cuartillas measure ~33 millimeters in diameter and weigh ~13.78gr. Buttrey & Hubbard{footnote}T. V. Buttrey and Clyde Hubbard, A guide book of Mexican Coins 1822 to date, 2nd edition, 1971{/footnote} show the image of what is apparently the only specimen publicly known of an octavo of Sonora — appropriately dated 1859 and labeled as being 28mm and 6.7gr.

KM 337 Octavo of Sonora 1859
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KM 365 Cuartilla of Sonora 1859
The new cuartilla and octavo of Sonora share the same design: on one side, the national arms of the decree of 14 April 1823: a Mexican eagle looking to the right, with a serpent grabbed with its beak and right talons, with open wings and standing on its left foot on a nopal cactus of eleven segments that protrudes from a rock on a lake; at the bottom, one branch of olive (or laurel) to the right and one of Encino oak to the left, tied up with a ribbon; and above the eagle — in semicircle around the margins, the legend — “EST.O LIB.E Y SOB.O DE SONORA.” — Spanish abbreviations for THE FREE & SOVEREIGN STATE OF SONORA. On the other side there is this classical allegorical representation of Liberty, as a feminine figure with braided hair, left breast exposed, seating on a pedestal, facing left and holding a pole with her right hand and a Phrygian hat at the end of it; her left hand is resting and the pedestal stand on a blanket of flowers with a Cornucopia in front, facing right. Around the lady — in semicircle — from left to right the legend indicating the value — either “UNA CUARTILLA DE REAL” or “OCTAVO DE REAL” — followed by the issuing date flanked by dots. The seating Lady Liberty — a prevalent iconography in Mexican state coinage since at least 1828 — was introduced for its first time to Sonora in 1859 and on this matter it is difficult to ignore the artistic influence of contemporary American coinage:


KM 71 1851 Seated Liberty Silver Dollar (Heritage Auction #1124, 2009. lot 2576)
Perhaps what makes Pesqueira’s new copper so especial to our story is that it carries an European-like very distinctive Eagle design, known today as the “Sonora Eagle” despite the fact that it was not conceived in Sonora, neither inaugurated by Sonora nor exclusively used by Sonora. As far as I can tell, based on publicly known specimens, this eagle design was officially used for the first time in a gold ½ escudo 1851 struck by the mint of Guadalupe y Calvo in Chihuahua state (then, a subsidiary of the Culiacán mint{footnote}Pradeau, op. cit.; Mike Dunigan and J.B. Parker, Resplandores. Cap and Rays 8 Reales of the Republic of México 1823-1897, Superior Stamp & Coin. Beverly Hills. 1997{/footnote}).


KM 378.3 ½E 1851 GC MP (Heritage Auctions, 6 September 2019, lot 31977)
In Sonora silver this special eagle design was used for the first time on the 2 and 8 Reales dating 1861; interestingly, always paired to a particularly large Liberty Hat design that, in consequence, has been also termed the “Sonora Hat” (or “Sonora Cap”). Dunigan & Parker refer to these two coins as: “…perhaps the most beautiful of the Cap and Eagle 8 Reales series. These coins feature the high relief Sonora Cap and Eagle. It was necessary to strike these coins under great pressure to bring up the details on the central devices“ {footnote}Dunigan and Parker, ibid.{/footnote}. I am from Sonora and I have to agree on this.


KM-377.9 8r 1861 Ho FM (Stack's Bowers Baltimore auction, 4 November 2010, lot 6348)
Wide "H", second "1" in date made with an "I" punch
In contrast, the earliest known appearance of this singular Eagle Hat pair occurred in Culiacán, in a copper pattern 8 Reales dated 1851{footnote}Dunigan and Parker, ibid.{/footnote}. Consequently, this “Large Liberty Hat” design is also not originally from Sonora.
Culiacán copper pattern 8r 1851 C CE (Re-colored {footnote}Dunigan and Parker, ibid.{/footnote})
The Large Hat design is known to have been used in various denominations of Culiacán Reales dating 1853, 1854 (paired with “Sonora Eagle”) and 1857/4 (paired with “Sonora Eagle”). It seems the Eagle design was last used in Culiacán silver coinage in 1857 (1857/4) — apparently recycling some old 1854 dies — but it continued in use on Culiacán gold coins of small denomination (½, 1 and 2 Escudos), at least until 1870. About the Culiacán Eagle design, Dunigan and Parker wrote: “Most of 1854 saw the continuation of the Sonora Cap and the introduction of the magnificent Sonora Eagle to silver coinage. This eagle made its only appearances on an 8 Reales of Culiacán Mint this year. It appears in Hermosillo in 1861 and 1862. Both obverse and reverse of the Sonora Cap and Eagle dies were produced from the same hub responsible for the 8 Reales pattern C 1851 CE. It is interesting to appreciate on why this reverse was not used on the 1853 issue. The Die Style of the 1854-1857 makes its first appearance this year. This Die Style is in much lower relief and seldom struck very well. Possibly the reason for discontinuing this beautiful design was that the minting equipment at Culiacán was not adequate to strike its high relief design. This is evident by the fact that well struck specimens of this issue are virtually non-existent. Many examples have extensive and severe die damage and deterioration” {footnote}Dunigan and Parker, ibid.{/footnote}.


KM 377.3 8r 1854 C CE (Stack’s Bowers auction, 24 June 2021, lot 72285)
Out of the 14 active mints of the nineteenth century Mexican Republic, only four mints are known to have used the Eagle design of the new 1859 Sonora cuartillas: Guadalupe y Calvo (GC) in Chihuahua (in 1851), Culiacán (C) in Sinaloa (in its 1851 pattern & since 1854) — both under control of the Jecker-Torre & Co. — Hermosillo (Ho) since 1861 and Alamos (As) in 1872, both in Sonora under the same Douglas-Symon-Miller administration. The Large Hat design seems to have been used only at Culiacán (since 1853), Hermosillo (since 1861) and Alamos (in 1872).


KM 374 2r 1872 A AM (Stack’s Bowers auction, 23 October 2019, lot 72547)
The migration of these punches, dies and/or hubs from Chihuahua/Culiacán to Hermosillo at one point before 1861 suggests a tight historical relationship between these mints — or at least between an artist engraver working for the private foreign entities that managed them. According to official accounts, the powerful firm Manning & Mackintosh owned the Guadalupe y Calvo Mining Company that was leasing the mints of Culiacán (C) and Guadalupe y Calvo (GC). In 1849, Mackintosh & Co. sold both mints to the firm Jecker, Torre & Co {footnote}Pradeau, op. cit. {/footnote}. The new leaseholders ran the Guadalupe y Calvo mint until 22 May 1852{footnote}Dunigan and Parker, op. cit.{/footnote}, when it was closed forever.

Die-association exercise between 1854/3 C CE (Stack’s Bowers & Ponterio auction, 2011) and 1861/54/3 Ho F/
C.M/E (listed as 1861/51) (Heritage NYINC Auction #3037, 4 January 2015, lot 30332)
Considering this, I regret to say that calling these designs “Sonora Hat” & “Sonora Eagle” — despite it sounding awesome to me — is, at minimum, misleading and perhaps it would be more appropriate to call them the “Guadalupe Eagle” (in reference to “Guadalupe y Calvo” 1851), the “Jecker Hat & Eagle” (in reference to the company that ran both the mint of Culiacán and Guadalupe y Calvo in 1851) or maybe just simply the “Culiacán Hat & Eagle” (in reference to the 8 Reales pattern of 1851 and to all the other coins issue there before any mint in Sonora was even running).


KM 377.9 8r 1862 Ho FM (Stack's Bowers Baltimore auction, 6 November 2010, lot 6350)


KM 377.9 8r 1862 Ho FM (Stack's Bowers Baltimore auction, 6 November 2010, lot 6353)


KM 377.3 8r 1853 C CE (Stack’s Bowers auction, 24 June 2021, lot 72283)
"MEXIGANA" legend error.
,
Alignment comparison between 8 reales of Culiacán 1854/3 C CE (Stack’s Bowers Baltimore Auction, May 2011, lot 8515), Hermosillo 1861 Ho FM (Heritage Auction #61167, 2010, lot 98102) and 1862 Ho FM (Stack's Bowers Baltimore auction, 6 November 2010, lot 6353).
Certain elements of the Culiacán die (such as the C, 5, 4, C and E) can still be seen on Hermosillo dies.


KM-378 ½E 1848 C CE (Stack’s Bowers NYINC auction, 15 January 2019, lot 43532)
diameter 15 mm. 1.690 g. 0.8750 gold
For a commentary on the half escudo, see here. From 1854 to 1870 this coin has the Sonora style eagle used on the late coinage of Culiacán and Guadalupe y Calvo. The dies were likely made by the Soho mint in England.
| Date | Asssayer | Recorded Mintage |
Comment |
| 1848 | CE | ||
| 1853 | CE | ||
| 1854 | CE | ||
| 1856 | CE | ||
| 1856/5 | CE | illustrated below | |
| 1857 | CE | ||
| 1859 | CE | ||
| 1860 | CE | ||
| 1862 | CE | ||
| 1863 | CE | ||
| 1866 | CE | ||
| 1867 | CE | ||
| 1870 | CE | illustrated below |


KM-378 ½E 1856/5 C CE (Stack’s Bowers auction, 31 October 2023, lot 70311)


KM-378 ½E 1857 C CE (Stack’s Bowers auction, 3 September 2025, lot 45455)
KM-378 ½E 1870 C CE.


KM-379 1E 1847 C CE
diameter 18 mm. 3.380 g. 0.8750 gold
| Date | Asssayer | Recorded Mintage |
Comment |
| 1846 | CE | ||
| 1847 | CE | ||
| 1848 | CE | ||
| 1849/8 | CE | illustrated below | |
| 1850 | CE | ||
| 1851 | CE | ||
| 1853/1 | CE | ||
| 1854 | CE | ||
| 1856 5/4 | CE | ||
| 1856 | CE | ||
| 1857/1 | CE | illustrated below | |
| 1857 | CE | ||
| 1861 | PV | ||
| 1862 | CE | ||
| 1863 | CE | ||
| 1866 | CE | ||
| 1870 | CE |


KM-379 1E 1849/8 C CE (Stack’s Bowers NYINC auction, 23 January 2025, lot 39194)


KM-379 1E 1857/1 C CE (Stack’s Bowers NYINC auction, 21 January 2026, lot 48000)


KM 380 2E 1857 C CE (Stack’s Bowers ANA auction, 24 August 2021, lot 45327)
diameter 23 mm. 6.770 g. 0.8750 gold
| Date | Asssayer | Recorded Mintage |
Comment |
| 1846 | CE | ||
| 1847 | CE | ||
| 1848 | CE | ||
| 1852 | CE | ||
| 1854 | CE | circulating counterfeit | |
| 1854 | CE | ||
| 1856/ | CE | underdate unreadable | |
| 1857 | CE |
diameter 30 mm. 13.540 g. 0.8750 gold
| Date | Asssayer | Recorded Mintage |
Comment |
| 1847 | CE | ||
| 1848 | CE |


KM 383.2 8E 1865 C CE (Stack’s Bowers Baltimore auction, 16 January 2021, lot 21075)
Diameter 37 mm. 27.070 g. 0.8750 gold
| Date | Asssayer | Recorded Mintage |
Comment |
| 1846 | CE | ||
| 1847 | CE | ||
| 1848 | CE | ||
| 1849 | CE | ||
| 1850 | CE | ||
| 1851 | CE | ||
| 1852 | CE | ||
| 1853/1 | CE | illustrated below | |
| 1853/2 | CE | ||
| 1855/4 | CE | ||
| 1855 | CE | ||
| 1856 | CE | ||
| 1857 | CE | ||
| 1857 | CE | No periods after Cs in mintmark and assayer's initials | |
| 1858 | CE | ||
| 1859 | CE | ||
| 1860 | CE | ||
| 1860 | PV | illustrated below | |
| 1861 | PV | ||
| 1861 | CE | ||
| 1862 | CE | ||
| 1863 | CE | ||
| 1864 | CE | ||
| 1865 | CE | ||
| 1866/5 | CE | ||
| 1866 | CE | ||
| 1867 | CE | ||
| 1867 | CE/CB | illustrated below | |
| 1868 | CE | ||
| 1869 | CE | ||
| 1870 | CE |


KM-383.2 8E 1853/1 C CE (Stack’s Bowers auction, 17 May 2024, lot 34245)


KM-383.2 8E 1860 C PV (Stack’s Bowers NYINC auction, 15 January 2022, lot 2307)


KM-383.2 8E 1867 C CE/CB (Stack’s Bowers auction, 3 June 2022, lot 72044)
| Year | Copper | Silver | Gold | Total |
| 1846 | 306,406.00 | 104,404.00 | 410,810.00 | |
| 1847 | 125,001.00 | 65,568.00 | 190,569.00 | |
| 1848 | 613,285.00 | 211,466.00 | 824,751.00 | |
| 1849 | 527,303.00 | 302,266.00 | 829,569.00 | |
| 1850 | 677,589.00 | 454,388.00 | 1,131,977.00 | |
| 1851 | 64,970.00 | 247,996.00 | 912,966.00 | |
| 1852 | 682,920.00 | 239,624.00 | 922,544.00 | |
| 1853 | 821,499.00 | 270,616.00 | 1,092,115.00 | |
| 1854 | 1,222,052.00 | 284,206.00 | 1,506,258.00 | |
| 1855 | 737,968.00 | 144,208.00 | 882,176.00 | |
| 1856 | 658,536.00 | 279,668.00 | 938,204.00 | |
| 1857 | 738,769.00 | 26,977.00 | 965,746.00 | |
| 1858 | 768,178.00 | 183,040.00 | 951,218.00 | |
| 1859 | 716,266.00 | 220,912.00 | 937,178.00 | |
| 1860 | 793,509.00 | 154,944.00 | 948,453.00 | |
| 1861 | 670,382.00 | 150,880.00 | 821,262,00 | |
| 1862 | 426,764.00 | 86,464.00 | 513,228.00 | |
| 1863 | 539,922.00 | 104,816.00 | 644,738.00 | |
| 1864 | 407,062.00 | 131,200.00 | 538,262.00 | |
| 1865 | 640,733.00 | 177,632.00 | 818,365.00 | |
| 1866 | 972,010.00 | 181,776.00 | 1,153,786.00 | |
| 1867 | 1.279,714.00 | 168,192.00 | 1,447,906.00 | |
| 1868 | 73,742.00 | 146,304.00 | 1,120,046.00 | |
| 1869 | 1,310,989.00 | 258,960.00 | 1,569,949.00 | |
| 1870 | 1.205,729.00 | 162,948.00 | 1,368,677.00 | |
| 1871-72 | 716,527.00 | 3,498.00 | 1,850,025.00 | |
| 1872-73 | 742,799.30 | 47,001.00 | 789,800.30 | |
| 1873-74 | 688,756.75 | 41,025.00 | 729,781.75 | |
| 1874-75 | 4,183.83 | 726,339.75 | 50,529.00 | 781,052.48 |
| 1875-76 | 11,469.63 | 746,396.50 | 55,920.00 | 813,786.13 |
| 1876-77 | 771,412.00 | 52,970.00 | 824,202.00 | |
| 1877-78 | 845,439.00 | 40,923.00 | 886,362.00 | |
| 1878-79 | 891,951.00 | 49,230.00 | 941,181.00 | |
| 1879-80 | 917,779.00 | 50,536.00 | 968,315.00 | |
| 1880-81 | 3,083.84 | 1,219,082.50 | 47.238.00 | 1,269,404.34 |
| 1881-82 | 926,713.00 | 32,080.00 | 958,793.00 | |
| 1882-83 | 744,823.00 | 57,860.00 | 802,143.00 | |
| 1883-84 | 574,944.00 | 27,038.00 | 601,982.00 | |
| 1884-85 | 641,721.00 | 68,360.00 | 710,081.00 | |
| 1885-86 | 5.55,185.00 | 41,940.00 | 597,125.00 | |
| 1886-87 | 708,730.00 | 38,177.00 | 746,907.00 | |
| 1887-88 | 763,994.00 | 23,638.00 | 787,632.00 | |
| 1888-89 | 946,502.00 | 20,418.00 | 966,920.00 | |
| 1889-90 | 1,018,790.00 | 33,555.00 | 1.052,345.00 | |
| 1890-91 | 52,502.00 | 14,889.00 | 867,391.00 | |
| 1891-92 | 735,812.00 | 15,110.00 | 750,922.00 | |
| 1892-93 | 680,533.00 | 25,012.50 | 705,545.50 | |
| 1893-94 | 1,940,676.00 | 97,678.00 | 2,038,354.00 | |
| 1894-95 | 1,784,234.00 | 73,690.00 | 1,857,924.00 | |
| 1895-96 | 2,233,288.00 | 85,286.00 | 2,318,574.00 | |
| 1896-97 | 1,729,359.00 | 43,768.00 | 1,773,127.00 | |
| 1897-98 | 3,000.00 | 1,673,657.00 | 24;521.00 | 1,701,178.00 |
| 1898-99 | 1,585,617.00 | 30,425.00 | 1,616,042.00 | |
| 1899-1900 | 1,933,230.00 | 39,450.00 | 1.972,680.00 | |
| 1900-1901 | 1,000.00 | 1,709,390.00 | 32,320.00 | 1.542,710.00 |
| 1901-1902 | 2,200.00 | 1,399,850.00 | 31,780.00 | 1,434,830.00 |
| 1902-1903 | 5,038.00 | 1,518,750.00 | 25,200.00 | 1,548,988.00 |
| 1903-1904 | 2,524.00 | 1,438,850.00 | 61,954.00 | 1,503,328.00 |
| 1904-1905 | 2,575.00 | 1,479,240.00 | 87,620.00 | 1.569,435.00 |
| Total | 138,274.30 | 7,620,780.00 | 6,559,794.50 | 24,318,939.60 |
The figures up to 1870 are from Anales del Ministerio de Fomento, México, l881, p.627, the figures from 1871 to 1905 from the Memoria de la Secretaría de Hacienda of the corresponding year.
Located in a once rich mining area, this city is the capital of the state of Durango.
The mint was opened in 1811 by the Spanish Colonial Govemment. By independence, after more than a decade of war, the country was bankrupt and it was urgent to find mechanisms that would help resolve this situation. The mint of Durango continued its work in 1821 and 1822 during Iturbide’s reign, producing 8 reales that were the same as the previous ones with the bust of Ferdinand VII, and ⅛ and ¼ real copper coins with the legend “DE LA PROVINCIA DE NUEVA VIZCAYA”.
| from | to | |
| Angel Pinilla Pérez (Intendente) | 1811 | 1812 |
| José María Barregas | 1812 | 1813 |
| Manuel de Escárcega | 1813 | 1822 |
| Julián de la Barraza | 1822 | |
| Leonardo Santoyo | 1823 | 1824 |
| Manuel Vicente Escárcega | 1824 | 1828 |
| Manuel Bras de Fer | 1829 | 1834 |
| Initial | Name | Begins on | Ends on |
| RM | Ramón Mascareñas | ||
| MZ | Mariano Zaldívar | ||
| CG | Cosme Garcés had been an assayer in San Luis Potosí before he came to Durango | ||
| RL | Ramón Luelmo | ||
| RM | Ramón Mascareñas |
The state of Durango officially took over the mint on 22 May 1824 and coins were produced annually until it was closed on 30 June 1895. The second location of the mint was at the intersection of calles 5 de Febrero (formerly de las Carretas) and Miguel de Cervantes Saavedra (formerly del Apartado). This site was located in what was the Palacio del Buen Retiro, so called because it served as a resting place for Archbishop Benito de Orta y Blanco, far from what were then the limits of the city. The third location was at calle Negrete N° 900 Pte. This building was acquired for the federal government in 1881, at a cost of $12,000, by Mariano Herrera, Jefe de Hacienda in the city, and José María Peimbert, interventor of the mint. The deed of sale was formalized on 31 December 1881 before the notary public Jesús Cincuenegui.

The interior of the mint, with insert of Norberto Domínguez
Durango was one of three mints that produced 8 Reales with the Profile or Hookneck Eagle design. However, there were problems with the quality of production in the beginning.
The early years were difficult for the State of Durango and its mint. There were times when the state did not have a legally organized government. The mint was forced to close from August 1826 until March 1827, causing the governor to complain that the loss of prestige associated with the closing would result in a reduction of the amount of metal brought in for coining. Citing the high cost of operation due to obsolete machinery, the governor recommended a study of the problems. Conditions and economics at the mint improved considerably when a 15 year lease[text needed] was granted on 24 November 1829 to Manuel Bras-de-Fer and Jose Antonio Pescador.
Under their able management production grew and quality improved dramatically. In 1832 Durango became the second Mexican mint to use hub for the production of dies. When the contract with Bras-de-Fer and Pescador expired on 20 November 1844 the mint was again closed. The State of Durango requested instructions from the Federal Government with regard to the mint. Having had no word from Mexico City, early in 1845 the state legislature accepted a provisional two-year contract{footnote}El Registro Oficial, Periódico del Gobierno del Departamento de Durango, Tomo 4o, Sem. 4o. 27 February 1845{/footnote} that was extendable to seven years with the approval of the Federal Government and the mint was re-opened. Although occupied by the Imperial forces of Maximilian from 4 July 1864 until March 1866, at least some production of Republican 8 Reales continued. Production of 8 Reale was halted in 1870 in favour of the Balance Scale Peso. It resumed in 1873 when that serie was discontinued. From the mid 1860 until the 1880s most of Durango's 8 Reales production was sent to the Orient.
This mint began to produce gold pieces in the year 1832 in values of ½, 1, 2 and 8 escudos. A variety of the 1836 ½ escudo is described here.
The mint also produced copper octavos (from 1824 to 1854) and cuartillas (from 1845 to 1872), with different legends according to the fact that if a Liberal government was established they carried the word "ESTADO" and if they were of the Conservative order they carried the legend "DEPARTAMENTO".
This mint was the fourth most productive in silver minting in the country after those of Mexico City, Guanajuato and Zacatecas.
It closed on 30 June 1895, when the federal government was in a position to settle the debt with the lessees and take possession.
| from | to | |
| 22 May 1824 | November 1829 | Government of the State of Durango |
| 24 November 1829 | 20 November 1844 | Manuel Bras de Fer and José Antonio Pescador |
| 19 February 1845 | 29 November 1847 | Hermann Stahlknecht |
| 29 November 1847 | 30 June 1849 | H. Bernardo Georgy |
| 1 July 1849 | 1857 | Government of the Republic of Mexico |
| 1857 | 16 December 1867 | José Dolores Grimaldo{footnote}Grimaldo was a local businessman, of Italian origin{/footnote}, Francisco Laborda{footnote}Laborda was a prominent merchant, of French origin{/footnote}, Hermanos Delius{footnote}The Delius brothers, Alberto, Agustín, German and Julio, were of German origin and had the commercial house that in 1843 operated under the name of Almacenes de Randell y Delius, then changed to Delius Hermanos and Delius Ortigosa, then to Delius e Hildelbrand to resume in 1864 as Delius Hermanos. German Delius and Maximiliano Damm formed a company with Alberto Delius in Hamburg as the partner in charge of the purchase and shipment of goods from Europe.{/footnote}, Toribio Bracho, representing Francisco Gurza{footnote} Gurza was the owner of mining haciendas, the La Concordia hacienda in the state of Coahuila and various other properties{/footnote}, Antonio Arana{footnote} The Spaniard Arana owned several mines in Durango, had commercial interests in London, Bordeaux and Bilbao and owned the brig "Gabriel" that sailed between Europe and the port of Mazatlan, Sinaloa{/footnote} and Pablo Jáquez{footnote} Pablo Jaquez was a Mexican who was dedicated to agriculture and various other trades.{/footnote}.{footnote}AHGED, Año de 1857, expediente sobre la entrega de la casa de moneda, núm. 199, Juzgado de Distrito, expediente núm. 68{/footnote} |
| 16 December 1867 | 31 December 1879 | Government of the Republic of Mexico |
| 31 December 1879 | 30 June 1895 | Cia. Limitada Central de Casas de Moneda de Mexico |
| from | to | |
| Manuel Bras de Fer | 1834 | 1835 |
| Manuel Ruiz de León | 1836 | 1842 |
| Manuel Bras de Fer | 1842 | |
| Marcelino Castañeda | 1842 | 1845 |
| Hermann Stahlknecht | 1845 | 1846 |
| Carlos Stahlknecht | 1846 | 1847 |
| Bonifacio Gutiérrez | 1848 | |
| H. Bernard Georgy | 1848 | 1849 |
| Dionisio Guerrero Tavizon | 1850 | 1852 |
| Francisco Elorreaga | 1852 | 1855 |
| Fernando Guerrero Tavizon | 1856 | 1863 |
| Luis de la Torre | 1864 | 1866 |
| Carlos León de la Peña | 1866 | 1872 |
| José María Peimbert | 1872 | 1879 |
| Enrique Amezcua | 1880 | 1893 |
| Norberto Domínguez | 1893 | 1895 |
In the investigations that I have been able to carry out within the Historical Archive of the Government of the State of Durango (AHGED) we have located files (some already classified and others in the process of being so), as well as some Periódicos Oficiales, that give us the name of the Durango assayers. Up to now the mention of the assayers’ initials in various books and catalogs, based on the research of Dr. Alberto Pradeau Avilés and published in his work Numismatic History of Mexico has in the main been wrong. Dr. Pradeau relates some events that gave rise to the different administrations of the mint of Durango, as well as others related to the assayers, although he confesses to not knowing the name corresponding to several of the initials that appear on the coins. Likewise, others he deduces from some characters in the political history of the state as if they were the assayers, but without checking the sources of the files or newspapers from which he took that observation.
Therefore, I will here list the names and correct data of the characters, in chronological order, with the intention that the pertinent corrections will be made in the specialized books and catalogs.


KM-377.4 8r 1834 Do RM
1.-Initials R.M. In 2022, a file was located in the Historical Archive of the State of Durango, in the Finance section, so today we know that they belong to Ramón Mascareñas, an assayer at the time of the War of Independence coins, and not to Ramón Mendoza, as mentioned in the book by Dr. Alberto Pradeau. The data was found in a still unclassified box of files in the section of “Hacienda” from 1811 in the time of the Nueva Vizcaya.
2.- Initials M.Z. Like the first ones these were located in still unclassified files in the Colonial section where the name appears as Mariano Zaldívar with his appointment as the main assayer of the Durango mint.
3.- Initials C.G. This assayer’s name, Cosme Garcés, was very hidden within the Archive’s documents. In the vast majority of documents from 1818 to 1823 his name was not mentioned and on one occasion did we locate a document of the year 1810 giving some reports of assays in the San Luis Potosí office, where his name is mentioned. It was not known if this was the same character but now we can be certain that when he finished his function as an assayer in San Luis Potosí he was hired in Durango for the years from1818. The reference is made in unclassified files for February 1823.


KM-377.4 8r 1829 Do RL
4.- Initials R.L. Nowadays we can be certain that these belong to Ramón Luelmo, as located in 2011, in the files of the Acts of Congress (Actas de Acuerdos y Decretos del Congreso del Estado de Durango) of 13 July 1826, which reported the payment to the assayer. This was outlined in my first book, Reseñas Históricas de Casa de Moneda de Durango 1811-1877, which was published in 2014.


M-377.4 8r 1848 Do CM
5.- Initials C.M. These belong to Cayetano Mascareñas and not to Clemente Morón, as was thought. This information was located in 2022, in file number 327 in the section “Correspondencias de la Secretaría General de Gobierno”.
Cayetano Mascareñas was the chief assayer in the years of 1848 and 1849. It is understood that it was only in the first months of this year that 8 reales coins were die-cut with his initials “C.M” since the lease contract of the Director Bernard Georgy was terminated and consequently the changes were made of of the assayer at the Durango mint.
However, it was this assayer who was ordered by the director to stamp the initials “B” and “G” on his 8 reales of 1848 and 1849, distributed on the obverses and reverses and representing the initials of Bernard Georgy. These initials have almost been found on most 1848 and few 1849 coins (since, as we have mentioned, Mascareñas was only at the mint for a few months of the latter year, before he retired).
A government inspection was trying to investigate the fraud of the counterfeiting of coins with a low silver content. It is said that director Bernard Georgy forbade entry to the government inspector and gave orders to the guards of the establishment that, if necessary, they should take out their weapons and use them to shoot this state government comptroller, named Dionisio Guerrero Tavizon, if he tried to pass. These are the violent stories of how these foreigners did whatever they wanted to do to have the support of characters within the government who were Conservatives.
After 17 years, Cayetano Mascareñas, returned in 1866 when the assayer Luis de la Torre (“L.T.”) left the mint and in 1867 when the French invaders were no longer in the state. There is a record that there were 431,000 pieces produced in that last year so that Carlos León de la Peña Muñoz (“C.P.”) who was a very accomplished and honest Liberal immediately returned. However, Mascareñas returned for the third time in the years 1873, 74, 75, 76 and 77.
A very interesting fact is that he worked for two years (1874 and 1875) he worked with another assayer named Jose Othón Huitrado (“J.H.”). These pieces are these are considered VERY RARE and RARE pieces
6.- Initials J.M.R. José María Ramírez only appears in a few months in the monthly assay reports in the Periódicos Oficiales, but Cayetano Mascareñas continued to exercise the role of jefe de ensayes until 1852, so, due to the lack of documentation, we are still unsure about this period in the life of the Durango mint.
7.- Initials C.P. These are of Carlos León de la Peña Muñoz, a declared liberal and patriotic supporter of President Benito Juárez against Maximilian, who was forced to leave the position of director of the Durango mint. He held several public offices, as well as that of professor at the Juárez Institute in 1875.
8.- Initials L.T. These belong to Luis de la Torre, as several documents refer to his appointment as director of the Durango mint in the years from 1859 to 1866. However, some receipts for payments for assays bear the name of a totally different person called Francisco Izurieta, though we do not know why.


KM-377.4 8r 1876 Do JH
9.- Initials J.H. These belong to José O. Huitrado Aguilar, who was sent from Mexico City to perform the job of assayer. This information was found in the Periódico Oficial of December 1874 (data shared by my companion and numismatic colleague Javier Ruiz Celis).
10.- Initials J.M.P. These were said to belong to someone named José Miguel Palma but this name never appears in the records. However, Ingeniero José María Peimber was an assayer and then director of the mint at this time. Hence his three initials on the 1877 8 reales, the rarest pieces of the Durango mint.
11.- Initials P.E. These belong to Pedro Espejo and appeared in the Periódico Oficial of 19 September 1877 where it was announced that the assayer Carlos León de la Peña had been appointed Director General de Rentas in the state and that the new assayer would soon arrive to take up his position.
12.- Initials T.B. These belong to the assayer named Trinidad Barrera and appear in a file dated 14 November 1878 where there is talk of a trial of the previous assayer for mismanagement of the production of silver coins. This would have been Pedro Espejo who was replaced by Trinidad Barrera.
13.- Initials J.B. These belong to Jacobo Blanco. This name was confirmed in an original report of April 1885, provided to us from a private collection of an acquaintance in the United States, which includes the original signature of the assayer and a red seal of the Intervention of the mint of the government of Durango. Blanco replaced Manuel del Cerro, according to a letter dated 23 February 1885, in which the latter asked for permission to be absent from the office of assayer, to act as Interventor in the month of July. He returned as assayer according to a letter of 9 July of the same year. So the 8 reales with the initials J. B. are extremely scarce, as he performed his functions for just four months.


KM-377.4 8r 1882 Do MC
14.- Initials M.C. There is no doubt that these belong to Manuel del Cerro, although Pradeau asserted that these initials could correspond to one of two people: Manuel Canseco or Melchor Calderón. The correct name was found in documents in the section “Correspondencias de la Secretaría General de Gobierno” 1885. In these, addressed to the secretary general of the government, Manuel del Cerro asks for permission to retire for four months from his duties as assayer and Interventor (very special, since he had a double function within the mint).


KM-377.4 8r 1882 Do JP
15.- Initials J.P. These are of Ingeniero José Gómez Palacios but were confused with those of another assayer, José María Peimbert (J.M.P.) because of the very similar initials. The original names were found in the Periódico Oficial of September 1890, where it is alluded that this person works as assayer and Interventor of the Durango mint. At the beginning of 1892 he went to Monterrey to establish the federal assay office and in 1895 he was summoned by Leandro Fernández to Mexico City to help him draw up the “Regulation of Mints” which at that time were being organised on a federal basis. In 1896 Gómez Palacios went to Culiacán as director of the city’s mint but only lasted two years until, sick through the climate, he returned to Monterrey. In addition, he held a position on the city council of Durango in the years from 1911 to 1912.
16.- Initials N.D. These are of Ingeniero Norberto Domínguez that appear in the files of “Correspondencias del Gobernador” of 1896. It is mentioned that he was highly recommended as being well prepared in the matter of the assay of metals and for having occupied the position as Interventor and assayer from 1892 to 1895. In addition to being a professor of meteorology at the Juárez Institute since 1892, he also held positions within the city council from 1892 to 1893 and from 1895 to 1897.
As an appendix I include a table giving the amount of silver coinage for each of the assayers of the Durango mint from 1824 to 1895. These figures are approximations based on data collected from archive files (from the Durango Mint section, 1824 to 1888, in the Center for Historical Studies of Mexico, Carlos Slim Foundation) and taking into consideration information from the Krause catalog section on Durango 8 reales (1889 to 1895).
These figures are the total of the silver pieces for ½, 1, 2 and 8 reales in addition to the pieces denominated in the decimal system such as those of 5. 10, 25 and 50 centavos and the balance scales pesos.
The table also includes information on the dates that each assayer held office. However, It should be noted that in some cases two or three assayers worked in the same year, sometimes for periods of a few weeks or months so it is very difficult to know exactly how many pieces are to be assigned to each of them due to the short time in which they were made and for the lack of documentary information.
| Dates | Assayer's name | initials | |
| 1824 to 1829 | Ramón Luelmo | R.L. | 3,590,813 |
| 1830 to 1849 | Ramón Mascareñas | R.M. | 15,483,663 |
| 1848 to 1849 and 1873 to 1877 | Cayetano Mascareñas | C.M. | 5,119,603 |
| 1849 to 1852 | José María Ramírez | J.M.R. | 1,941,994 |
| 1852 to 1864 and 1867 to 1873 | Carlos León de la Peña | C.P. | 11,659,379 |
| 1864 and1865 | Luis de la Torre | L.T. | 1,414,992 |
| 1872 and 1877 | José María Peimbert | J.M.P. | 1,166,976 |
| 1878 | Pedro Espejo | P.E. | 900,919 |
| 1878 to 1880 | Trinidad Barrera | T.B. | 2,668,035 |
| 1880 to 1882 | José Gómez Palacio | J.P. | 4,272,788 |
| 1882 to 1890 | Manuel del Cerro | M.C. | 9,206,211 |
| 1885 | Jacobo Blanco | J.B. | 1,131,644 |
| 1892 to 1895 | Norberto Domínguez | N.D. | 5,512,000 |