It is strange. But the #'s stamped into the lock and then the frizzen part of the lock All match. The main spring is also Coil. I have the lock soaking in oil right now. its really a clean piece. Has about a 20lb trigger but the oil should help that up. May just spent the $30 and have TOW tune the lock.
Doesnt even have a touch hole liner, just a small hole drilled into the side of the barrel.