I also like the old American lock. That helped convince me to buy it. The trigger guard and cheekpiece remind me of J. M. Wood rifles, but not close enough to say it is. I found this, I think is the same lockmaker:
ROGERS, John — Philadelphia, Pa., ironmonger listed (with Charles Rogers) in the City Directories at 7 N. 2nd Street, in 1809, and at 52 High Street, from 1810 to 1824. Then Rogers Brothers & Co., are listed at 52 High Street, until 1846. John Rogers (sometimes also spelled Rodgers) bought the Valley Forge in 1814. On March 21, 1821, in association with Brooke Evans of 120 High St., Philadelphia, Rogers took over the refunct contract of Alexander McRae of Richmond, Va., of July 28, 1817, for 10,000 muskets at $12.75 per stand. Brooke Evans remodelled the old forge and iron works into a gun factory, and by Dec. 31, 1823, John Rogers and Brooke Evans are recorded to have delivered 5,730 muskets on the contract. On Jan. 1, 1825, John Rogers (alone) contracted for 5,000 Model 1816 muskets at $12.25 per stand, to be delivered at the rate of 1,000 per annum. This contract was probably shared with Wm. L. Evans, a practical gun-maker who managed the Evansburg arms works.