WELL DONE, Sir !
Going by the caliber stamp, I doubt that's an original factory barrel. I think you've got a nice OLD "Custom" there.
Curious about the screw in the receiver bridge, too. can't really say I've seen that before.
Best of luck with a neat new thumper, regardless!
GTC
Thanks, I suspected it was a custom, as I'd never seen a saddle ring carbine before in an 1885, and the price was too low to be a rare variation. Maybe I lucked out and he also put a fast twist barrel in it, too.