Did a takedown of this 1860 Spencer Carbine, and noticed a series of 'hatch marks' on the underside ( inside ) of the Wooden Forearm and on the bottom of the barrel, behind the screw attachment and even on the Magazine tube ( extra I mark on the tube ) that follows the rounds.
Marks are in the form of this: IIII \
Any purpose or meaning? I searched for similar markings, but mostly found Proof and Inspection marks, of course.
Photo attached, of all three parts, ( forearm, tube, barrel ) marked as described above.
Is this common?
Thanks again.