I took a magnified picture. It looks more like a stag with a Star inside the circle of the horns. The one letter is a T. The other is maybe an O, S, C?

[Linked Image from i.imgur.com]

This is a picture of the same numbers between the Purdey locking bolts. The gun is a H&H made in 1904 with the standard nitro proof marked.

[Linked Image from i.imgur.com]

Thanks
Ken

Last edited by KDGJ; 06/02/24 08:14 PM.