Well you've got a point - there ARE so many posts are over the years, I know I can't remember everything. And I sure don't know everything! One thing of interest, I think every one of these I've seen has been in relatively plain maple. The stocks all look to be so close - in profile shape and overall lines - you would think they had been roughed out on a duplicator, something like a cheekpiece being added or deleted at will. I really think someone was just cranking these things out using a complete array of import locks, barrels and furniture, a true "stocker" who likely wasn't making any of the hardware. I just wish I knew who it was!
Someone I had a discussion wth years ago at dixons suggested that, like the earlier German or Belgian "import" pieces of the 1760s-1770s (probably right up until the war), these may perhaps have been post-war imports. I have to disagree with this, not just based on the American maple alone which I wouldn't see as a make or break issue, but just in that they look so very Northampton-ish and also they would be pretty passe in both style and size by the time the later 1780s rolled around. I truly think someone there in the upper Bucks or Northampton area from Allentown southward was just whipping these out for anyone and everyone.