I bought a rifle recently that was built in 1966, it has no name on it anywhere. After disassembling and cleaning the entire rifle and all part, I found the date 1966 inscribed on the inside of the lock and the bottom of the barrel. The following initials of H.P.M. were inscribed on the inside area of the hammer between hammer and lock face. Does anyone happen to know of a builder from the 1960's with those initials?