Mexico 1730-Mo R real

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from the Sedwick Treasure Auction 21, lot 750

This specimen was lot 750 in Sedwick Treasure Auction 21 (Winter Park, FL, May 2017), where it sold for $329. The catalog description[1] noted, "Mexico City, Mexico, cob 1 real, 1730R. Small thick flan with choice full date and oMR, nice full cross, richly old-toned VF+. Photo by Mora Garcia-Barneche." This specimen is a silver cob one real struck at Mexico City in the years before the conversion to milled coinage. Specimens with clear dates are unusual. This type is separated from KM 30, struck 1701-28, by its lower fineness; the earlier issues were .931 fine silver.

Recorded mintage: unknown.

Specification: 3.38 grams, .917 fine silver, .200 troy oz ASW, this specimen 3.40 grams.

Catalog reference: Cayón-8474, S-M24; KM-30a; CT-1585.


  • Michael, Thomas, Standard Catalog of World Coins, 1701-1800, 7th ed., Iola, WI: Krause Publications, 2016.
  • 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.
  • [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

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