Good point, maybe it was nitro proofed . I'm not sure when the reproof stamp came in but can't see one.
I think they're Asbury initials on the barrels and Baker (ejector) patent on the fore end. It's London or Birmingham crown/lion stamps that seem to be absent. It's a bit of a puzzle, it all looks British apart from that I hope someone with more info will chime in soon.

Last edited by El Garro; 05/01/17 01:20 PM.
Rust never sleeps !