Agree, a shame, I seriously doubt that it came with that crude breech mech. People were kind of ruthless back when, when it came to antiques.
There's a gent in PA who got a very nice Hotchkiss 1.65 in. breechloading mountain gun. He couldn't quite figure out the ignition system it came with so instead of just asking someone, he bored a vent in the top of the barrel so he could shoot it. When I saw that I didn't know whether to laugh or cry, or what to say, so I just went and hid for a while.