This is a very good condition example of a Colt London 1851 Navy revolver with all matching numbers. It is "possibly" one of 23,500 Colt London Navy revolvers purchased by the British War Department for issue to the Royal Navy and the British Army during the Crimean War, but "possibly not". It is in extremely good condition for this model as most saw hard use during the Crimean War and in colonial warfare around the globe. The revolver has a gray patina finish on all parts with slight trace finish in protected areas. It has standard iron straps and very thin waist-wasped grips that retain most of their aged varnish. It fits in the hand perfectly. All action, edges and markings are excellent save for as broken stop spring (the trigger portion still works), easily replaced for $5 or $10.00. It has about a 75% clear cylinder scene and shows the heavily knurled hammer spur and round head screws. The left side of the barrel lug is stamped with the War Department "Broad Arrow" property mark above "W D", however it has no other British proofs anywhere on the gun. It came to us from Canada and I therefore think this was a gun that never saw final inspection but may have been shipped to Canada for Police, Military or civilian use. I have NEVER, seen a London produced gun with London address without the proofs. If you collect variations or London produced Colts, this one, being particularly interesting with no proofs would fill a spot in a collection of good crisp guns.