Another point that should be mentioned here, is, that many trade gun manufacturers had no qualms at all with copying other countries proof, and view marks, If it served their purpose. I have seen guns with versions of British proofs on the top of the barrel, and Belgian proofs on the bottom. One such gun was a very well preserved late flint that was found in Alaska. It had a lock that was very much like the one we are talking about. Between the cock, and the pan, it had a top view of a honey bee, with the letters B, and A on the wings. This gun might have been unfired, and if it was fired at all, it was very little. There was still a bit of a burr where the touch hole had been bored with a less than sharp bit.
Hungry Horse