Mexico (1556-98)-Mo O 4 reales

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Heritage sale 3064, lot 31344
Mexico H3064-31344r.jpg
another four reales of Philip II, from an unknown Heritage sale before 2009
Mexico c1556 4 reales rev Heritage.jpg

This specimen was lot 31344 in Heritage sale 3064 (Chicago, April 2018), where it sold for $840. The catalog description[1] noted, "Philip II Cob 4 Reales (1556-98) Mo-O AU58 NGC, Mexico City mint. Near Mint State, much luster present on the broad and well-struck flan." This type was not dated and the terms of service of the various assayers ("O" in this case) are still hotly disputed. In 1728, cobs were debased from .931 to .917 fine silver.

Recorded mintage: unknown.

Specification: 13.53 grams, .931 fine silver, .405 troy oz ASW.

Catalog reference: Cayón-3753, KM 36.


  • Krause, Chester L., and Colin R. Bruce II, Standard Catalog of World Coins: Spain, Portugal and the New World, Iola, WI: Krause Publications, 2002.
  • 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.
  • Menzel, Sewall, Cobs, Pieces of Eight and Treasure Coins, New York: The American Numismatic Society, 2004.
  • [1]Cristiano Bierrenbach and Warren Tucker, Heritage World Coin Auction 3064, featuring the Doug Robins Collection of Canadian Tokens, Dallas, TX: Heritage Auction Galleries, 2018.

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