Jani - Not necessarily a gun, it could be an innovation, for example H. Pieper got the same award for introduction of the mono-block in 1889? (I think). Some of his SxSs have this bragging right on the mono-block, just happen to have one of those. So what became an almost norm in gun production after 1932?,I'm no expert but off the top of my head "ejectors" / some such gizmoe comes to mind. Perhaps the more knowledgeable will jump in here. FWIW --- John can.