DelSnavely said:
So what do I look for on the inside of this lock to determine it's origen? There is no writing.
Do a photo as close as possible centered on the tumbler.
Its very difficult sometimes to figure these things out. A great number of people out there are clueless. There is one of my rifles out there, circa 1968, with a Douglas barrel and a Russ Hamm "Gonter" that two antique dealers told an owner was a rev-war piece. Even though its signed on the barrel and OBVIOUSLY has a modern barrel.
The engraving. The engraving seems identical on the cock of your lock and the lock in the Russ Hamm ad. The Russ Hamm and later Dean Mitton ads both use the same photograph and while the reproduction in the Mitton ad is a little better what is there is not decernable its just a change in the texture where the lettering is. Chances are the design on the cock was not even drawn on by the engraver in the 1840s just cut from memory and they were far more concerned with speed than uniformity from piece to piece.
Since its got a lock bolt screw hole the lock in the ad is a used lock or maybe the original.
The frizzen spring on your lock is identical to the two Russ Hamm frizzen springs I still have and those pictured. He used the same spring on all the flintlocks he made as near as I can tell. I have a Maslin flint cock someplace but its apparently "someplace safe" so safe I can't find it. I also have a Maslin percussion hammer from 1972 or so and it does not have the engraving the one in the ad has but has engraving like the flint cock.
So what is in the ads may be in conflict with reality depending, maybe, on when something was made.
I simply am attempting to help you here. The chances that someone used an original lock is pretty remote. Its possible but you must be SURE before making pronouncements.
From what I have seen its a Hamm lock. But I could easily be wrong.
I gotta run.
Dan