RichC, I agree with Gerben that the 655 marking identified the head inspector, whose team was responsible for inspecting the parts produced on the luger line during this period. Ocassionally you will see a military PO8 with mixed inspector marks, indicating that the head inspector changed during the period when the receiver was inspected and the final inspection. DWM and Erfurt had a similar system during the Imperial period, but instead of a number, the individual inspectors were identified by a scriptic letter under a crown. I suspect that their mark, was the first letter of their last name, as some of these letters will have a "rocker" or cheveron under the letter to distinguish inspectors whose name started with the same letter. Some sub-inspectors during both periods will only be identified with a single roman letter or number on various parts of the pistol. Th
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