I got this early Rock Island single bolt stock years ago. It had been paint white for some ceremonial functions. it was a nice sold stock with a faint Rock Island cartouche, after being very careful in removing the white paint, I noticed the A T over 21 stamps on the butt.
I had to assume it might be US Navy because of the stamps, later Tom in NJ sent me
an email and said the stock marking was a US Navy designator for the ocean going tug the USS Bagaluce in service from 1919 to 1946Attachment 92298