I'll bet it's an early one too, maybe a '21/'28... I'd love to examine that one. Friend of mine passed a few years ago and before he went he donated his M1"T" to a local military museum. He had procured this M1 from a Canadian
Engineer Officer that had taken it off a German
that had taken it off an American. All had carved their initials in the butt. All this had happened at Arnhem. He kept it for sixty years... Now it's crowded into a small display case with no mention of the actual provenance.