OK. First the lock:
There are no markings on the outside of the lock. Here is what I found on the inside: In the center of the lock plate are the letters: FD FD gd L
The front inside of the lock plate has four intentional hash marks. And a series of small, round punch marks on the inside of the hammer and pan, as well as the pan cover of the frizzen. Maybe just assembly matching.
The first F could be something different as it's partially covered by the mainspring. (I guess I could take the mainspring off)
Rick
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