This is a early 1900s takedown shotgun that's made by Stevens under Browning's patent. It has some old stock repairs and a adjustable choke. The only thing I really see wrong with this is after each shot you have to hit the slide release to pump it. I believe the shotgun is well over 100 years old. This one doesn't have the brownie patent stamp on it like others I have seen. The style of slide release with the markings puts it somewhere between 1913 and 1920. It has a 1905 and a 1907 patent date. I believe this is a model 520 but don't seem to be markedI