A wooden cart dressed up as a boat, a ‘diver’ wearing a cooking pot as a helmet but complete with a weight and a large buffer tank with reducer valve. I wonder if this helmet was diveable but the cart was built for a carnival parade somewhere in Germany in the first half of the 20th century. The back of the photograph is marked ‘Etyel Holzhandlung Fisschergasse’ ( Etyel wood company, ‘Fisschergasse’ is a street name ) When you know more about this picture, the wood company or the Fisschergasse then please let us know. Thanks.