This appears to be an Indian trade gun, with a branded stock. It obviously was converted to a military musket by the addition of a bayonet lug. The question if which side of the conflict did the wonderful relic fight for? Hungry Horse
The sheet metal furniture, and the ID (Indian Department) branding makes me stick to my assumption that this is a treaty gun, or a gift to an influential chief. Hungry Horse
The total lack of inletting on the triggerguard tells me this is the original. Also, the lack of a triggerplate, and the use of a trigger nut instead points to it being an Indian trade item. Hungry Horse
What I find somewhat odd about this old fowler is that, very obviously, there is inletting for the lock and the now missing side plate. Why no visible inletting for a triggerguard or triggerplate? I do not think that "hurried war production" is the answer. Many of the fowlers in Grinslade's book are dated to the Rev War period and yet they all have completed component inletting. Perhaps we are missing something here, but what, I do not know.