Please help with Arty stock I.D.

[calibrator]

Hello, I recently purchased this stock from a dealer you all know and love. I trust him to have my best interests at heart. While I don't get screaming deals from him I feel that I get my moneys worth. Please speculate on the possible history of this piece. The stock has NO further markings, however I would like an opinion about the circular mark with the 3 punctures on the right side behind the iron. The holster mount holes have not been used to mount leather. I paid $725 Thank You in advance!! Joe