Bill, beats me !!
Quite often you will see a designation of a 12XXd for a Luger and then they will say that it has all parts with matching serial numbers and show a picture of the trigger sideplate with a big "34" on it. Duh !!! It doesn't take a rocket scientist to figure out the serial number.
I think some people are worried about registration and some are concerned about the legality of the pistol. I can't think of anything else that would prevent the specification of the number. Just privacy. FRAXX
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