Languages Deutsch Edit links. Year denotes the year of change. There are no re proof marks, bo you think these guns went to the RAF without proof marks and then returned to be proofed and sold? Just wondering, I have an old double barrel shot gun stamped "Field London" and the proof marks say from the Birmingham Proof Housebut the barrel is stamped Indicates that a barrel has undergone a special proof for heavier loads than normal. Print Topic.
Mike August 2, at 8:
Gun Barrel Proof Marks
Hop to: National Heritage List for England. For provisional proof for barrels. Print Topic Switch to Threaded Mode. This so-called "secret" marking system was as follows, with the marks illustrated below applying as indicated. I recently was handed down two side by sides that were owned by my grandmother's father.