The Becker semi-auto Revolving Shotgun,
No I did not get my gun terminology wrong, this is a semi-automatic revolver. Designed in 1899 these interesting revolving shotguns were not produced until after World War I. Made in Germany, it was a five shot 16 gauge shotgun with a revolving cyclinder. Shells were inserted into a loading port on the right hand side, and also automatically ejected with each shot. The most interesting thing is this is not a double action or single action revolver, it is a semi-auto revolver. For the first shot the user cocked a lever near the top of the barrel. The force from each subsequent shot works a mechanism which turns the cylinder and cocks the gun.
Made by Romerwork in Suhl, only 100 of these uniques shotguns would be produced.