Petlis/Peter,
If it's a Bess, then get a copy of AMERICAN MILITARY SHOULDER ARMS by G.D. Moller ((Univ Press of Colorado, 1993) through interlibrary loan. This has the details on 1,000 Wilson-contract Long Land pattern muskets purchased by the CITY OF NEW YORK (and so marked) in 1755, that were sold to the state in 1758 and used to arm three battalions of New York Provincial Regiment in 1758. They were part of the force attacking the French at Fort Carillion (Ticonderoga).
These were apparently bobbed to Short Land Pattern length and branded N-Y 1 Reg on the buttstock, but ya gotta see the photos.
This might have been the sort of weapon your persona and would be equally appropriate for RevWar.