Mexico 1755-Mo MM 4 reales
This is one of a series struck 1747-60 during the reign of Ferdinand VI. Assayer MM is listed for 1754-64. The four reales is the scarcest colonial denomination although all dates are available except for the very rare 1732 and 1733. Harris lists the Ferdinand VI pillar four reales in order of abundance: Mexico, Guatemala, Lima (scarce). Specimens in high grade are 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.
Recorded mintage: unknown.
Specification: 13.54 g, .917 fine silver, .399 troy oz ASW.
Catalog reference: Cayón-10517, Gilboy M-4-29, KM 95.
- 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.
- Harris, Robert P., Pillars & Portraits, San José, CA: Bonanza Press, 1968.
- 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.
- Harper, David C., ed., North American Coins & Prices: A Guide to U. S., Canadian and Mexican Coins, 17th Ed., Iola, WI: Krause Publications, 2007.