What are these proof marks?

[Lugerdoc]

IMHO, The proofs shown at the beginning of this thread were all applied at different times. The middle crown over a letter indicates to me that the unassembled receiver was inspected during WW1 and leftover as a spare part at war's end. The right most eagle, is a Weimar test fire proof for the entire assembled pistol, which as later repaired or accepted (left most eagle) by a Nazi repair depot. TH