I bought these 2 Drillings and a Stevens 22/410 yesterday after long negociations. I know I got a deal, but I don't know anything about these Drillings. This one is a J P SAUER & SOHN and I think 16 gauge. I have no idea about the rifle barrell. Here is some pics of the markings if anyone can help. 1. 2. 3. 4.