Hsiawen,
Very nice pictures, thanks for the details (you got shots of the entire gun?).
Circle-B on a 9mm barrel may have something to reveal about Brazilian-contract Lugers. Quite a conundrum here, in that the c-B on your gun is haloed. Grounds for much thought.
Can you take a very close-up, sharp, detailed picture of the witness mark on this gun?
--Dwight
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