Re: 1920 Single date
Aarron Davis's book"The Luger Handbook"lists 1920 M&P as "this model consists of reworked and newly assembled parts pistols",also that newly assembled parts "only had Nitro proofs".This single date only has Nitro proofs and the date is not restruck as there are no signs of another date being removed.Thats why M over A may indeed be a Mauser rework stamp.Another interesting thing is the"O on the grip strap.This is a Naval mark but this has a 4" barrel.Thanks for your input. Mike C.
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