Spanish Cob in 14k Solid Yellow Gold mount. ((NEED HELP TO FURTHER INDENTIFY!!))

[HavenForest]

Any information regarding what I have and I would be grateful .
Any info regarding further identification, and then any information as to an estimated value.

 

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[Diver_Down]

What you have is a cob minted in Mexico City. The assayer mark of P is unknown. From Sedwick's book, "Name Unknown. Typical assayer for Mexican silver coins salvaged from the Concepcion, sunk in 1641. The assayer served from 1634 - 1666. Consequently, the cob was minted during the reign of King Philip IV. The weight of your piece or a photo with a known object (penny, quarter, etc.) will give an indication of the denomination. Most likely a 4 or 8 reale.