My dad, who died last year at age 95, always said it was his grandpa's (my great-grandpa's) gun. GGPa died in 1931 at age 90, so we really don't know when he might have bought it or when it was last shot. Dad was born in 1917 on the same farm that GGPa bought in 1893, and dad said he never shot it.
We don't know if GGPa bought it new or used from a hardware store or from a neighbor. Regardless, it obviously had been shot a lot since the left trigger sear is completely worn, stock and forearm are cracked and the barrels are at least 1/16" off face. Dad said that he was told that a hole had developed between the barrels or chambers to such an extent that it would double fire. No way to know if that is true or not.
