Hi All, New to the web site and looking forward to here from members. Bought a Browning Supreposed from an estate. Serial # 133x , made in 1931 by serial # lookup. By the trigger on the right, it has what looks like a selector switch. Can anyone help me with this? In front of the forearm is like a shoehorn that holds it in place. The shotgun is in great shape and doesn't seem like it was shot much Came with a Browning Leather case with a Browning gold disk on case. Can anyone tell me about what I have? Here are some pictures. John