Hi Mike,
* Early Erfurt magazines bear the full 1 to 4 digit numerical number of the matching pistol and the lower case alpha suffix letter block as well. A "+" on the mag's wood bottom would indicate the reserve (spare) magazine. Typically, the early erfurt mags would have two crown/Fractur letter inspector's acceptance marks, one on the leading edge & one on the trailing edge(spine side) of the mag's bottom. The numerals would be placed perpendicular to the long axis of the plug and would be about centered. The mag's tube would be bright, tin colored, sheet metal folded and crimped with a coiled spring inside. The outside metal surface may have a gold colored wash (hue).
* Would you mind telling us a bit more about your Erfurt Luger?
- What year might be stamped on the chamber.
- The S/N (with suffix if it applies) as it appears on the barrel and/or front frame ahead of the trigger guard.
- Whether markings appear on the grip strap(s). If so, please post exactly what appears with all spaces, punctuation, etc.
* Are digital pictures available to post in this thread for our review? Given this info, we may be able to supply a good deal of "motivation" if your example falls within the known Lugers issued to those serving the German S. African colonies early last century.
* Thank you! Hope to be hearing from you soon.