Nice looking fowler. It looks to me like the parts probably all came from the same French gun. I think it's unlikely that New Englanders had access to French parts in any market. I agree with Mr. Pierce that the French influence probably came about because of Louisburg, but it was in 45', during King Georges War, and then maybe again in 1755. That was the catalyst for the French style in New England guns. I do think there were smiths in N.E. that were capable of making parts as fine as that, but only when they were "forced" or paid to. It is definitely not a Hills gun, and was most likely made close by, as it seems to be a Worcester County gun, maybe an Earle. It would be interesting to see the muzzle end, and the possibility that it was longer at one time. 42" is very short for a Rev. or earlier New England fowler. Being made for a bayonet in 1775 is also a real possibility.