Spain
Charles I (Emperor Charles V) gold Escudo (Ducat) ND (1536-1537) MS61 NGC, Barcelona mint, Fr-36a (under Catalonia), Cayon-3238. Struck for the 1536-37 expedition to Tunisia, this rare type is difficult in any grade, more so in Mint State. This example, featuring a "K" in two angles of the reverse cross, is bright and exhibits much luster.
Estimate: 1800-2400 USD