Mexico 1851-Zs OM 4 reales

from the Mountain Groan Collection

Stack's Bowers June 2026 World Premier Collectors Choice Auction, part of lot 73321

Shown is an 1851Z^S-OM 4 reales, one of a type struck at the Zacatecas mint 1830-70. Assayer OM is recorded for 1830-55. Ten mints (Mexico City, Guanajuato, Zacatecas, Potosi, Oaxaca, Hermosillo, Real del Catorce, Guadalupe y Calvo, Guadalajara and Culiacan) struck this type of which Zacatecas is tied with Guanajuato as the commonest mint. This date is common. The second specimen was part of lot 73321 in Stack's Bowers June 2026 World Premier Collectors Choice Auction (Costa Mesa, CA, June 2026), where it sold for $536.80. The catalog description^[1] noted, "MEXICO. Septet of 4 Reales (7 Pieces), 1850-55. Zacatecas Mint. Average Grade: VERY FINE. All: KM-375.9. 1) 1850-Zs OM. 2) 1851-Zs OM. 3) 1852-Zs OM. 4) 1852-Zs OM. Small planchet. 5) 1853-Zs OM. 6) 1855/4-Zs OM. 7) 1855-Zs OM. SOLD AS IS/NO RETURNS. From the Kirk Menczer Collection of Republican Reales Minors."

Recorded mintage: unknown.

Specification: 13.54 g, 0.903 fine silver, .392 troy oz ASW.

Catalog reference: KM 375.8.

Source:

• Buttrey, T. V., and Clyde Hubbard, A Guide Book of Mexican Coins, 1822 to date, 6th ed., Iola, WI: Krause Publications, 1992.
• Michael, Thomas, and Tracy L. Schmidt, Standard Catalog of World Coins, 1801-1900, 9th ed., Iola, WI: Krause Publications, 2019.
• Utberg, Neil S., The Coins of Mexico, 1536-1963, San Antonio, TX, 1963.
• ^[1]Orsini, Matt, Kyle Ponterio and Jeremy Bostwick, June 2026 World Premier Collectors Choice Auction - Selections from the L.E. Bruun Collection, the Richard Margolis Collection and the Kirk Menczer Collection of Republican Reales Minors, Costa Mesa, CA: Stack's Bowers Galleries, Inc., 2026.

Link to:

• 1850-C 4 reales
• 1850-GC 4 reales
• 1850-G^O 4 reales
• 1850-M^O 4 reales
• 1850-P^I 4 reales
• 1850-Z^S 4 reales
• Durango 1851 1/8 real
• 1851-G^O ¼ real
• 1851-SLP^I ¼ real
• 1851-D^O ½ real
• 1851-G^A ½ real
• 1851-GC ½ real
• 1851-G^O ½ real
• 1851-M^O ½ real
• 1851-P^I ½ real
• 1851-Z ½ real
• 1851-C real
• 1851-G^A real
• 1851-GC MP real
• 1851-G^O real
• 1851-P^I real
• 1851-Z^S real
• 1851-C 2 reales
• 1851-D^O 2 reales
• 1851-G^A 2 reales
• 1851-GC 2 reales
• 1851-G^O 2 reales
• 1851-M^O 2 reales
• 1851-Z^S 2 reales
• 1851-G^O 4 reales
• 1851-P^I 4 reales
• 1851-C 8 reales
• 1851-C^A 8 reales
• 1851-D^O 8 reales
• 1851-G^A 8 reales
• 1851-GC 8 reales
• 1851-G^O 8 reales
• 1851-M^O 8 reales
• 1851-P^I 8 reales
• 1851-Z^S 8 reales
• 1851-D^O ½ escudo
• 1851-GC ½ escudo
• 1851-G^O ½ escudo
• 1851-M^O ½ escudo
• 1851-D^O escudo
• 1851-G^A escudo
• "1851-GC" escudo (counterfeit)
• 1851-G^O escudo
• 1851-G^O 4 escudos
• 1851-C 8 escudos
• 1851-C^A 8 escudos
• 1851-D^O 8 escudos
• 1851-G^A 8 escudos
• 1851-GC 8 escudos
• 1851-G^O 8 escudos
• 1851-M^O 8 escudos
• 1852-C 4 reales
• 1852-Z^S 4 reales
• Coins and currency dated 1851
• return to Mexican imperial and republican coinage, 1822-1905