Mexico 1770-Mo F 1/2 real
The 1770MoF is one of a series of half reals struck 1760-1771, during the reign of Charles III. Gilboy lists this date as rare (less than two dozen pieces known). He records the 1770MoM as being only scarce.
Mexican numismatists hotly debate which side of the coin constitutes the obverse. Gilboy depicts the shield side as the obverse as that side bears the king's name. However, auction catalogs and dealer listings more frequently use the pillars and globes side as the obverse, as that side bears the date.
Specification: 1.69 grams, .917 fine silver, .049 troy oz ASW.
Catalog reference: Gilboy M-05-48, KM 68.
- Gilboy, Frank F., The Milled Columnarios of Central and South America: Spanish American Pillar Coinage, 1732 to 1772, Regina, Saskatchewan: Prairie Wind Publishing, 1999.
- Yonaka, Brad, A Variety Guide to the Fractional Pillar Coinage of Mexico City, 1732-1771, Long Beach, CA: Agorocu Consulting, 2017.
- Harper, David C., ed., North American Coins & Prices: A Guide to U. S., Canadian and Mexican Coins, 17th Ed., Iola, WI: Krause Publications, 2007.