We also have an inherited LC Smith shotgun--two interchangeable double barrels, one is 28" and the other is 30". Both barrels are 12 gauge. Serial No 2087754E, Pat July 13, 1886 Hunter Arms Corp. Fulton, NY. Two forearms Pat. May 28, 1901. Nitro Steel on the barrels and a HA CO Mark. This was my wife's grandfathers who died in 1949. Any help you can provide would be appreciated-just e mail me. Thank, Chuck Heinz