There is nothing about this gun that resembles American work of the late 1700s. It would not matter whether it was proposed that it was made by American gunsmiths named J Ferree or J Dickert or J Schreit or J Bonewitz or JP Beck, folks who have studied colonial and federal period American guns could not see architectural or stylistic reasons to suppose this gun was made here. So, all it has going for it, in regards to a link to America in the late 1700s, is a name engraved on it that is the same as a couple of important makers of Pennsylvania longrifles.