This is an old Crosman 400 that came from my grandfather. It looks to have been made in the early 1960's. It had some surface rust and a worn finish on the stock. I slow rust blued the barrel and used Oxphoblue on the other parts. I stripped the stock and went with six costs of Fromby's Tung Oil. It still hold air and shoots nice. I hope to find some scope mounts and put a scope on it sometime.