Reales issues of the Zacatecas mint (8 reales)

KM-377.13 8r 1841 Zs OM (Stack’s Bowers Hong Kong Auction , 8 October 2022, lot 54473)

Diameter 39 mm. 27.070 g, 0.90277 silver

KM-377.13 8r 1828/7 Zs AO (Stack’s Bowers auction, 28 February 2024, lot 73330)

Counterfeits

counterfeit KM-377.13 8r 1829 Zs AO (Briggs & Bustos Counterfeit issues, 22 February 2025, lot 37)

Struck in silver.

counterfeit KM-377.13 8r 1831 Zs OM (Briggs & Bustos Counterfeit issues, 22 February 2025, lot 38)

Struck in silver. This is absent in Riddell, greater similarity of design on the side of the cap while on the obverse the eagle is thinner.

counterfeit KM-377.13 8r 1832 Zs OM (Briggs & Bustos Counterfeit issues II, 10 August 2025, lot 78)

Contemporary counterfeit struck in low-fineness silver. Notable for its exceptional similarity to the official issue of the Zacatecas mint, described by Riddell as “admirably imitated, or perhaps genuine.” Every design element matches the original, except for the edge, whose engraving is slightly less refined and shows weakness along the rim from 9:00 to 1:00 on the obverse side.

counterfeit KM-377.13 8r 1841 Zs OM (Briggs & Bustos Counterfeit issues II, 10 August 2025, lot 79)

Contemporary counterfeit struck on a flan of alloy commonly known as alpaca. Counterfeit not documented in Riddell’s work, identifiable by the backward “s” letters in the legend on the cap side, along with a reverse distinguished by the eagle’s curled feathers.

counterfeit KM-377.13 8r 1842 Zs OM (Briggs & Bustos Counterfeit issues II, 10 August 2025, lot 81)

Contemporary counterfeit struck on a low grade planchet. Easily recognizable by its distinctive Phrygian cap with rounded edges, surrounded by short and narrow rays. Eagle with narrow body and a noticeably smaller left wing. Slight differences in the legend typography. Crude edge design.

counterfeit KM-377.13 8r 1844 Zs OM (Briggs & Bustos Counterfeit issues II, 10 August 2025, lot 80)

Contemporary counterfeit struck on a flan of alloy commonly known as alpaca with low silver content. Specimen not reported by Riddell. Features a curious cap design that, when compared to a genuine piece, appears wider and slightly flattened. The reverse shows an eagle characterized by plumage composed of well-defined lines, with an apparent error in the legend: “REPULLICA.”