Valuation DWM Luger

[Lugerdoc]

I agree that this is the Crown overstamp on the original suffix letter. I'm surprised that none of the luger researchers have been able to determine why or by whom this was done. It's been my observation that the suffix letters that I seen overstamped like this were in the s,t & u blocks, which would put them in the 1928-29 BKIW production era. TH