Watch List notes:

WORLD COINS, MEXICO, Carlos & Joanna, (1516-1556). Silver 4 Reales, undated M-M (Mexico City), assayer R (Francisco del Rincon). 13.1g. Early coinage (1536). Crowned arms of Castille and Leon; gothic-style mint marks. Rev. Crowned pillars, value between, rounded panel; assayer mark below. (KM 0016; Nes-6a). Well struck, attractively toned example. NGC graded EF-40.

Estimate: $ 2,000