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Issues of the Guadalupe y Calvo mint (copper and silver)

Copper

Quarter real (cuartilla)

Diameter 12 mm. 0.845 g. 0.90277 silver

KM 368.4 ¼r Guadalupe y CalvoKM 368.4 ¼r Guadalupe y Calvo reverse
KM-368.4 ¼r Guadalupe y Calvo 1844 GCLR (Stack’s Bowers Baltimore Auction, 28 March 2011, lot 8090)

The ¼ real coin was only produced in 1844. It bore the initials LR, which are those of the former assayer of the Mexico City Mint, Luciano Rovira.

Silver

Dunigan and Parker point out that the tools sent from the capital were probably only used in the first year (1844) and thereafter dies were manufactured locally, which explains the varieties of engraving that exist on the coins of 1845 and 1846Dunigan and Parker, Resplandores, 1997, p. 202. The uniform style from 1847 onwards can be explained by (i) the remittance of dies from the mint of Culiacán, leased by the same institution and (ii) the implementation of new minting machinery.

Half real 

KM 370.6 1844KM 370.6 1844 reverse
KM-370.6 ½r 1844 (Stack’s-Bowers auction of Kirk Menczer Collection. 23 June 2026, lot 72129)

Diameter 16 mm. 1.690 g. 0.90277 silver

Date Assayer Recorded
Mintage		 Comment
1844 MP    
1845 MP    
1846 MP    
1847 MP    
1848 MP    
1849 MP    
1850 MP    
1851 MP    

 

KM 370.6 1845KM 370.6 1845 reverse
KM-370.6 ½r 1845 (Stack’s-Bowers auction of Kirk Menczer Collection. 23 June 2026, lot 72130)

KM 370.6 ½r 1846 GC MPKM 370.6 ½r 1846 GC MP reverse
KM 370.6 ½r 1846 GC MP (Stack’s Bowers Baltimore auction, 16 May 2023, lot 70520)

One real  

KM 372.5 1r 1846 GC MPKM 372.5 1r 1846 GC MP reverse
KM 372.5 1r 1846 GC MP (Stack’s Bowers Baltimore auction, 28 March 2011, lot 38186)

Diameter 20 mm. 3.380 g. 0.90277 silver 

Date Assayer Recorded
Mintage		 Comment
1844 MP    
1845 MP    
1846 MP    
1847 MP    
1848 MP    
1849/7 MP    
1849/8 MP    
1849 MP    
1850 MP    
1851 MP    

  

Two reales 

KM 374.7 2r 1848 GC MPKM 374.7 2r 1848 GC MP reverse
KM-374.7 2r 1848 GC MP (Briggs & Bustos auction XII, April 2025, lot 251)

Diameter 27 mm. 6.760 g. 0.90277 silver 

Date Assayer Recorded
Mintage		 Comment
1844 MP    
1845 MP    
1846 MP    
1847 MP    
1848 MP    
1849 MP    
1850 MP    
1851 MP    
1851/0 MP   illustrated below

  

KM 374.7 1851 overdateKM 374.7 1851 overdate reverse
KM-374.7 2r 1851/0 (Stack’s-Bowers auction of Kirk Menczer Collection. 24 June 2026. Lot 73017)

Four reales  

KM 375.3 4r 1844 GCKM 375.3 4r 1844 GC reverse
KM 375.3 4r 1844 GC MP (Stack’s Bowers Baltimore auction, 28 March 2011, lot 3843)

Diameter 32 mm. 13.540 g. 0.90277 silver 

Date Assayer Recorded
Mintage		 Comment
1844 MP    
1845 MP    
1846 MP    
1847 MP    
1849 MP    
1850 MP    

  

KM 375.3 4r 1845 GCKM 375.3 4r 1845 GC reverse
KM 375.3 4r 1845 GC MP (Stack’s Bowers Baltimore auction, 28 March 2011, lot 3844)

KM 375.3 1846KM 375.3 1846 reverse
KM-375.3 4r 1846 GC MP

Eight reales 

KM 377.7 1844KM 377.7 1844 reverse
KM-377.7 8r 1844 (Ponterio sale 154, lot 6368)

Diameter 39 mm. 27.070 g. 0.90277 silver 

Date Assayer Recorded
Mintage		 Comment
1844 MP   Reversed superscript s in fineness
1844 MP    
1845 MP   Eagle's tail square (illustrated below)
1845 MP   Eagle's tail round
1846 MP   Eagle's tail square
1846 MP   Eagle's tail round
1847 MP    
1848 MP    
1849 MP    
1850 MP    
1851 MP    
1852 MP    

  

KM 377.7 1845 square tailKM 377.7 1845 square tail reverse
KM-377.7 8r 1845 square tail (Stack’s-Bowers auction, 15 August 2023, lot 51324)

Variety with rounded cap and square-tailed eagle

KM 377.7 1846 reverseKM 377.7 1846
KM-377.7 8r 1846 (Stacks-Bowers auction, 23 February 2022, lot 74640)

KM 377.7 1846 GC lot 6323
KM-377.7 1846 (Ponterio Baltimore sale 155, November 2010, lot 6323)

Retrograde 'S's in 'Ds20Gs'

KM 377.7 1846 GC lot 6324KM-377.7 1846 (Ponterio Baltimore sale 155, November 2010, lot 6324)

Mule: small rounded cap and normal eagle.

KM 377.7 8r 1849 GC MPKM 377.7 8r 1849 GC MP reverse
KM 377.7 8r 1849 GC MP (Stack’s Bowers ANA auction, 20 August 2021, lot 41182)