This is a handmade, single shot needle fire pistol (zündnadelpistole) made by a German gunsmith named A. Knoch in Munich in 1850. I have been unable to find any documentation about the man, but the gun is an interested example of the needle fire system that existed as one of the intermediate technologies between the percussion cap and the self-contained metallic cartridge. This example is in unfortunately rough condition, but on disassembly we can see how everything was supposed to work.