I have seen coins sold as pirate coins. They are replicas of eighteenth-century Spanish coins and fantasy coins.There are also some genuine Spanish coins recovered from shipwrecks.
The only coins that I remember from the theft of American silver are British. They are those coins that have the word "Vigo".
They are coins of 2 or 4 maravedis, some of them are restruck with number 8 or VIII because they were used later as 8 maravedis.
Several coins have the rampant lion on one side and the castle on the other, symbols of the kingdoms of Leon and Castile. This is the most common design of maravedis between the XV and XVIIth centuries.
The best conserved, the 4th coin, is probably 2 maravedis of Charles II about 1680 KM#190.
The reference book about these coins is Numismática Española by Calicó.
Referee for Spain, Iberia (ancient), Suebi Kingdom and Visigothic Kingdom