Mexico (1542-55)-Mo O 4 reales

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from Sedwick Treasure Auction 21, lot 679

This specimen was lot 679 in Sedwick Treasure Auction 21 (Winter Park, FL, May 2017), where it sold for $411.25. The catalog description[1] noted, "Mexico City, Mexico, 4 reales, Charles-Joanna, 'Late Series,' assayer O to right, mintmark oM to left (oM-O), encapsulated NGC AU 55. Light rich toning (attractive), bold details, slightly off-center pillars with trifle doubling." This undated type is recorded with assayers A, D, G, L, O, R and S, suggesting a substantial and lengthy production.

Recorded mintage: unknown.

Specification: 13.67 grams, .931 fine silver.

Catalog reference: KM 0018; Nesmith-110b; CT-88; S-M10, Cayón no. 3116.


  • [1]Sedwick, Daniel F., Augi Garcia and Cori Sedwick Downing, Treasure Auction #21, featuring Selections from the Richard Stuart Collection, Winter Park, FL: Daniel Frank Sedwick, LLC, 2017.
  • 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.

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