I have seen a few really nice 1790-era southern rifles built using that lock, although it is a bit fancier in appearance than typical export grade locks that would have more likely found their way onto the typical American longirlfe of the era. It does sort of fill in the time gap between the Chambers Early Ketland and Late Ketland styles if you want to build something that falls into the mid 1780s-1800 timeframe and stick with an English style lock. The plate size (still over 5 inches long) and shape are very close to some of the export Ketland locks of that era. So really any southern style rifle you like from that era - one of Shenandoah Valley schools, Rockbridge, SW Virginia, piedmont Carolina, even a really early Appalachian rifle from western NC or East TN - heck even something that might have come out of mid-Tennessee like Thomas Simpson's work, or a very early Kentucky made rifle. Possibilities are endless.
Guy