The Anchor Engineering 1921 Karl Heinke Munich Germany S No 04525 Diving Helmet is an antique reproduction of the US Navy Mark V diving helmet, made of steel. With dimensions of approximately 16" x 12.5" x 17" (40 x 32 x 42cm) and a weight of around 7.5kg, this diving helmet represents a unique piece of military history from the US Navy.
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