Just to confirm that Zulu’s gun isn’t a Blakely. It’s smooth-bored. It looks to be entirely cast iron. It hasn’t got a breech band (obviously unnecessary for a smooth-bore), it hasn’t any breech or trunnion markings, but it has a muzzle stamp, which is unknown on Blakely guns.
I am sure that, as everyone else has said, it’s a Coston Lyle life-saving gun.
I admit to getting excited that it might have been one of the CS Texan Blakely’s reported in the OR. But it would indeed make a nice “Blakely” mountain gun.
Starr