Spanish silver 4 Reales cob coin minted circa early 1600's in Potosi, Bolivia, during the reign of Philip IIII.
Obverse: Cross with the lions of Leon and castles of Castile.
Reverse: Shield coat of arms with denomination at right.
Custom set into a sterling silver bezel pendant with 18k yellow gold prongs, measuring approximately 1 and 1/2 inches from the top of the bail to the bottom of the bezel, 1 and 1/4 inches across.
The famed Portobelo Treasure Hoard of 1630 was a discovery of a stash of 4,500 silver cobs found in the jungles of Panama along the El Camino Real Trail.