Boy, there sure isn't much info on Ethan Allen's guns. I know this is a long rifle forum and these aren't that long. But they're American, muzzle loaders, and show the transition between the individual gunsmith method of making rifles, to the emerging industrial age methods. They were still hand made. Somehow he and a brother-in-law or two, like Thurber, made hundreds if not thousands of guns, mostly the revolving pepperboxes. But some fine hunting and target rifles too. Side Hammer no. 10 rifle numbers seem very low, I've read perhaps 100, but there had to be more.
"No American gunmaker of his time manufactured a more diverse line of firearms. During the percussion era he produced the Underhammer, the Bar, the Box-lock and the Straight-away single-shot pistols as well as the Pepperbox, the Transitional revolver, the side- and center-hammer Revolvers. He made Target pistols, with and without detachable stocks. His rifles were both single and double, revolving cylinder and breech loading. His shotguns, single, double and combination, plus a Whaling gun." (Earlv Allen Firearms - Harold R. Mouillesseaux)