Mexico 1750-Mo M real
The first specimen is a 1750/49 overdate. It is one of a series struck 1747-1760 for Ferdinand VI. It is distinguished from later issues (KM 76.2, 1757-60) of pillar one reals by having similar crowns atop the pillars on the date side. The variety shown is unusual in that both the tens and ones digit of the date have been overstruck. This variety is listed by Gilboy as very rare.
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: 3.38 grams, 0.917 fine silver, 0.099 troy oz ASW.
Catalog reference: Cayón-10282 (overdate), Gilboy M-1-23a, KM 76.1.
- Gilboy, Frank F., The Milled Columnarios of Central and South America: Spanish American Pillar Coinage, 1732 to 1772, Regina, Saskatchewan: Prairie Wind Publishing, 1999.
- Cayón, Adolfo, Clemente Cayón and Juan Cayón, Las Monedas Españolas, del Tremis al Euro: del 411 a Nuestros Dias, 2 volumes, Madrid: Cayón-Jano S.L., 2005.
- Calicó, Xavier, Numismática Española: Catálogo General con Precios de Todas las Monedas Españolas Acuñadas desde Los Reyes Católicos Hasta Juan Carlos I, 1474 a 2001, Barcelona: Aureo & Calicó, 2008.
- 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.
- Harris, Robert P., Pillars & Portraits, San José, CA: Bonanza Press, 1968.