Mexico 1901-Zs AZ peso
This coin was lot 9200 in Ponterio sale 150 (Los Angeles, August 2009), where it sold for $4,600. The catalog description noted, "MEXICO. Peso, 1901-ZsAZ. EXTREMELY RARE. Cleaned, VERY FINE." History does not record the reason for the appearance of assayer AZ who appears nowhere else in the coinage. The date 1901-ZsFZ is common and comprises just about the whole mintage cited below.
Recorded mintage: 5,706,000 (including assayer FZ).
Specification: 27.07 g, .903 fine silver, .786 troy oz ASW.
Catalog reference: KM-409.3.
- Cuhaj, George S., and Thomas Michael, Standard Catalog of World Coins, 1901-2000, 42nd ed., Iola, WI: Krause Publications, 2014.
- Ponterio, Richard, and Kent Ponterio, Ponterio sale 150: The 2009 Los Angeles ANA Auction, Irvine, CA: Bowers and Merena, 2009.