1,066.8 oz .999 Silver Shipwreck Bar — SS Gairsoppa, HM Mint Bombay

The 1,066.8 oz .999 Silver Shipwreck Bar — SS Gairsoppa, HM Mint Bombay is among the most historically significant silver bars available to collectors today. Cast and stamped at His Majesty's Mint in Bombay, this substantial ingot bears serial number JZ0432, a fineness mark of 999.2 (approximately 0.999 fine silver), and a struck weight of 1,066.8 troy ounces — all hand-stamped directly into the bar's face alongside the HM Mint Bombay crown hallmark.

The SS Gairsoppa was a British India Steam Navigation Company cargo ship carrying a consignment of silver bars when she was torpedoed by a German U-boat in February 1941, sinking approximately 300 miles off the coast of Ireland in nearly 4,700 meters of water. In 2012 and 2013, Odyssey Marine Exploration conducted one of the largest deep-ocean silver recoveries in history, bringing up thousands of bars from the wreck. Each bar is a direct artifact of that recovery — carrying the original colonial-era mint stampings undisturbed across eight decades on the ocean floor.

This bar's provenance, extraordinary weight, and traceable serial number make it a centerpiece acquisition for serious silver collectors and maritime history enthusiasts alike.