P38 magazine:

ENM 18th variation 

The rectangular welding spots are characteristic for magazines produced by Erste Nordbohmische Metallwarenfabrik (ENM). JVD is the secret code assigned to ENM and this company used the inspection stamp E/WaA706.

Magazines of the 18th type were stamped with the P38 designation on the left side of the housing. The ENM code jvd and the ENM Waffenamt E/WaA706 were stamped on the spine. The position of these markings may vary.

This magazine was produced by ENM and issued with late war Spreewerk pistols.