Or, most likley, it was originally proofed at Birmingham. :blush: Military US firearms were never proofed. I have a MB42a that came over lease lend in February 1941, Clearly marked Property of US Goverment. The rifle spent it's time in service, ending up in a Sea Cadet unit. When they gave up the armoury it came to my RFD who called me. There was no proof mark on it. It has since been properly proofed by the London house. Having had another close look at all my various paerwork, the certificate for my Webley is clearly marked Duplicate, so they are available.