7/12/19 - This is a S/42 code numbered luger magazine. The s/42 code indicates the magazine was used as a field replacement magazine made by Mauser in 1939 and the early 1940s. These magazines usually weren't numbered, but this magazine is and the numbering looks to be period correct. The magazine frame is in excellent condition with no rust or pitting. Feeds well with an excellent spring as well. Guaranteed original.