Tim,
The breechblocks of 1920DWM ("1923 Comercial") are found both numbered and unnumbered; firing pins are generally unnumbered. Could you please report the serial number and other details of the gun for the Commercial database and the serial numbering database?
It would be useful to see pictures of this gun. If the condition is as you report and the finish is original, its asking price is something less than half its value.
--Dwight
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