Lagopus, Thanks for the input. I know it is hard to see but the barrel is definitely marked Nitro Proofed and has the NP under what looks like an upheld arm with a sword (London definitive nitro proof for all guns since 1904) and 1 1/8. It is my understanding the Joseph Lang & Son on 102 New Bond Street is the banner used from 1901 to 1905. As per my chamber gauge it is more 2 3/4 and maybe the chamber was recut and it was reproofed at this time. I will update once I hear back from Atkin, Grant & Lang.
Thanks all for the input... WBLDon
