This magazine was produced by ENM as immediately indicated by the elongated welding spots. Magazines of the 10th type were stamped with the ENM code jvd and with the ENM Waffenamt E/WaA706 on the spine. The positions of the marking on the spine can vary. The left side of the magazine housing is stamped with the model designation P38 above a large U. These magazines were issued only with Spreewerk pistols from the second alphabetical series (letter prefix), and with the Zero Series Spreewerk pistols.