It has a firing pin retaining screw in the breech ball similar to a Baker, with a Baker appearance It does not cock with the rotating cocking arms like a Smith And it has a sideplate, similar to a Lefever
And at least one was manufactured
The gun originally had the Curtis forend push-rod release but at some point the FE was replaced
The mechanism
Interestingly, the barrels carry a 1942 SN. Not marked "Armor" but with "Belgium LLH" for the tube maker.
A.P. Curtis worked for Hunter Arms from 1899 to 1917 and was the plant superintendent 1910 - 1917. He was General Manager of Hunter Arms Co. from 1940 until his death in 1941 and may very well have replaced the FE and barrels at that time.
I'm sure Buck Hamlin, who is a Smith, Lefever and Baker expert would enjoy looking over the gun, which certainly appears have been used!
Drew I still own this gun. I purchased it along with some other guns and tools from the son of the barrel maker that worked for LC Smith. This was about 20 yers ago. If anyone is interested I could post some additional pictures. It has been used quite a bit over the yers. As I recall it was marked Fulton, I would need to pull it out of the safe to refresh my memory. I have fired it and it is fully functional. Thanks for the patent info.