Several iterations and generations of Golcher family members made locks for the trade as pointed out by Hawg. The lock generally on American made rifles does not reflect who made the rifle, just like in modern times builders use L&R, Davis or Chambers locks on their muzzle loading gun builds. Typically if the gun's maker signed his work, it will be on the top flat of the barrel in between the breech and the rear sight. We will need to see good clear pictures of the full rifle, both side views and top and bottom views.
Not trying to be a smart Alek, but what you've given us is like showing us a picture of an aftermarket mag wheel and asking for an identification of the vehicle it's mounted on.