Hello all, I work at the Kaiserslautern Rod and Gun club near Ramstein AB in Germany. We were recently given a bunch of abandoned guns from the Air Force armory to make use/dispose of. One of these is a shotgun we're trying to get more info on. It's a Lefever 12 ga side-by side. Many of the markings are worn, but the ones still plainly visible are: "Lefever Arms Co.", "Krupp Fluid Steel", serial number is "51101" and "Patended 18220.127.116.11.86.87". The stock is split in 4 places directly behind the receiver. Any info would be appreciated.