P38 magazine:

ENM 22nd variation 

The rectangular welding spots indicate immediately that this magazine was produced by ENM (Erste Nordbohmische Metallfabrik). Magazines of the 22nd 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 spine also is stamped with the Walther inspection code E/359, which indicates that the magazines were issued with Walther pistols (ac44).