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I just acquired a 1914 DWM, s/n 37a, that has the "Bo30" marking on the bottom of the barrel. I understand that to signify the barrel is made of Bohler steel and that they are rare. I'd like to get a better understanding of how rare, why so few were used and why they were used. I'm digitally challenged and have yet to learn how to post pictures, but would be happy to forward scans to someone more technically adept than I.
Thx, Lyn
Thx, Lyn