Hello all. I'm new to the forum and have a question about a M1917 I have. It has all the markings of a US Army gun, matching serial numbers, matching assembly numbers, inspection stamps, etc. It also has a Nitro Proof mark (NP with arm & sword) wth .45" .900" 7 TONS which I understand means the gun was released to the British civilian market. True? If so, what happened in between its time with the US Army and its time in the UK? There are several other marks, including a flaming bomb, three eagle heads (with S2, S4, and S24), A9 on the bottom left butt near the grip alignment pin, M on the other side of the butt, R in the yolk cut. There are also seven identical London stamps, a Crown over the interlaced letters GP, one in each cylinder flute, and one on the bottom, right side of the frame, forward of the trigger. What I don't find are any UK proofs on the barrel, no crossed swords, or Not English Made. It also has no serial number on the bottom of the barrel. That area is blank and perfectly flat. Is this normal? Any insight into this gun's history would be greatly appreciated.