BTW, since it's all out in the open now:
the name on the lock is "J. Heinnerich Fesler" (the I or J is under the cock)
It's pretty bold, my first thought is 'german lockmaker' but it's awfully prominent, much like the way locks were marked when the maker built the whole gun or was running the shop.
A Henrich Fesler arrived in 1733, a Johan Heinrich Fessler in 1766 and a later guy who really has no bearing on this (same name though) was born in 1771 iirc in NC, family moved down from Germantown (had been in Phila. area through 1750s-60s it seems). That's all I've found thus far. The 1733 guy seems like an interesting candidate but he left no trail that I've been able to follow thus far. Ship Samuel, w/ wife and daughter. That's it.
One funny note. There was a Fesler who arrived in the mid 1750s, w/ two sons: Andreas Fesler and Albrecht Fesler. (Think on that a minute).
Could this be a German gun in curly maple?