I think that it was factory re-barreled because it has something I have never before seen. The barrel has a notch cut on the underside near the muzzle which is normal for the takedown lever lock on a rifle with a full length magazine tube, but what was really unusual was that the dovetail for the full length magazine tube hanger had been carefully and expertly filled:

It looks to me like the factory used a barrel made for a full length magazine and modified it for use with the half magazine. I don't recall ever having noticed a filled dovetail on a half magazine rifle, but then again I haven't seen many half magazine 1894 take-downs. Have any of you seen anything like it?
The rifle resisted dis-assembly as the takedown was difficult to get apart, but with the aid of some Kroil oil it was accomplished and the rifle cleaned up very nicely. Nothing aggressive was done, just removal of all the old dirt and dried oily crud inside, replaced the broken firing pin, and glued a tiny chip that fell out of the stock's upper tang edge. The bore came out shiny with no apparent pitting. Since it is not my rifle I am not going to post pictures of it, but I did want you guys to see the unusual barrel and perhaps offer an opinion.
Shasta