The SS Gairsoppa was carrying a cargo of more than 7,000 tons including silver ingots. The ship was hit by a storm and running low on coal and was diverted to Ireland. At this time, a German UBoat spotted the boat and torpedoed the ship which led to its sinking in 1941, along with the silver. Forty-eight tons of silver was recovered in 2012 by the Odyssey Exploration team at a depth of 15,000 feet. Each bar is inscribed with its ID number, weight, fineness, and has been stamped by an assessor to prove their authenticity.