Hal,
Raimey kindly emailed the photos to me. The gun does have proofs.The use of both powder and bullet(steel jacketed bullet) together with the lack of case length indicates it was proofed before the 1911 improvements were implemented in 1912.The bore diameter being shown in mm rather than gauge indicates it was likely close to the implementation date. The nitro proof and steel jacketed bullet,makes it more likely that the chamber is 9.3x72R, but I would still recommend a chamber cast.BTW the crown W on a shot gun barrel means the barrel is choked. The crown U is the view proof, which is a detailed inspection. The shotgun caliber(ga) shown in a circle w/o a "70" next to it indicates it was chambered for the standard length shells, which would have been 65mm.Sorry for the confusion.
Mike

Last edited by Der Ami; 12/24/13 01:36 PM.