7/26/17 - This is an original MP40 sub machine gun magazine. The magazine is desirable due to the maker and year. The spine of the magazine is "40" dated. There is also a rare "122" code maker stamp (code for Mauser). There are also two eagle/37 proofs on the spine, and a WaA387 proof stamp. The left side of the magazine frame is stamped "M.P. 38u.40". The magazine has some normal wear, mostly along the edges. There is no significant rust or pitting though, and the blued finish is generally in tact. The spring is strong and fully functional.