Their discovery dates back more than 300 years to what’s known as the Spanish Treasure Fleet of 1715, the divers said. Although the silver coins were crusted over and rusty, with faded ...

MORE LIKE THIS: "Silver coins can develop a thick crust from corrosion ... According to antique coin valuations website CoinQuest, the value of Spanish cobs from this era varies depending on ...

This stamped coin, issued by Ferdinand and Isabella of Spain, was minted in Seville at around the time of Columbus and found in Sark in 2005. The good quality of its silver made Spanish coinage ...