That's very interesting. I bought a rusty perc. lock still attached to the barrel at the Cumberland Show last year and after a little bit of cleaning it said T&C Neave, Cincinnati. the lock is smaller (4") and the barrel is 33 3/4" in length and 7/8" across the flats. It seems to have been the original length and for a smaller person (approx. .40 cal. smoothbore). See you at the Show. James Levy