A Bismarck coin made with Hidden History.

How it works: reserve yours for $1 today. If 100 backers join by 3 December, we make it and charge the rest: the coin is $25 in total, plus $5 shipping worldwide. If we don't reach 100, your $1 comes back automatically.

In May 1941 Bismarck left Norway on her only mission, Operation Rheinübung. She went north around Iceland into the Denmark Strait, and on 24 May 1941 she sank HMS Hood within minutes. Three days later, after a Swordfish torpedo from Ark Royal jammed her rudders, she was sunk about 300 miles west of France on 27 May 1941.

Front: BATTLESHIP BISMARCK across the top, Bismarck at sea seen from the bow quarter inside a rope ring, and 1941 on the plate. Back: a sea chart of Operation Rheinübung, with her route from Bergen and both dates.

Spec: 45 mm, die-struck brass, antique finish, in a clear capsule.

Images are design renders, not photos of a struck coin.