I also have a Moxham pistol from the War of 1812. It has the proper marks and was no doubt in 'His Majesty's Stores' for distribution to the Native allies of Britain. Since these were said to be issued in pairs, I think that I need another one. I purchased mine from Patrick Donnelly when he was alive. Mowbray Publishers produced a book titled 'BRITISH MILITARY PISTOLS and Associated Edged Weapons"by Robert Brooker. While it does not shed much light on the 'trade gun' it does reveal a great deal about the effort to arm allies over the decades that England was in America.Dick
The gun should have 1813 proofs...it was issued to the natives in 1813 which is well documented....barrel length 48.5"..over all length 64". The gun is the standard text book design of the North West Gun issued to the Indians in 1813, some have minor variations but this one has all of the classic features. There is variations from maket to maker.