Daryl, Jacob Glahn went to Hunter Arms in Fulton from Syracuse in 1893 with his 3 sons. In the obituary for Jacob who died in 1902 said he took control of the engraving department with his sons Theodore and Augustus. I never saw any mention of any work his sons did there. I know one engraved for Colt and another one engraved I believe a pistol for then President Teddy Roosevelt.
In comparing this signed Glahn engraving, the dog in the background does not look like his style (maybe a bad day, no erasing here)
This unmarked grade Syracuse L.C. Smith is Glahn.
This is the left lock showing Glahn's name to the left of the sear axle. (hold Ctrl and then hit + to enlarge, just don't forget to hit Ctrl - to reduce back to normal)
I have seen a few guns with Glahn SC on them and the one by Spangler SC. The SC stands for sculpted.
