This magazine was produced by the Erste Nordbohmische Metallwarenfabrik (ENM) as immediately can be seen from the rectangular welding spots. The left side of the housing is stamped with jvd and P38. Two stamps can be found on the spine: E/WaA706 above jvd. jvd is the secret manufacturer code assigned to ENM. E/WaA706 is the ENM inspection stamp. This magazine variation was only issued with Spreewerk and Mauser pistols from 1944.