Hillshooter: H. & D. Folsom Arms Company was not a manufacturer, but a mega wholesaler of firearms. They purchased Crescent Fire Arms Company in1893. Folsom also imported multiple thousands of trade name firearms from Belgium made by Henri Pieper, Simonis, Janssen, Dumoulin and Company and many other manufacturers.
Crescent Fire Arms Company was the manufacturer of the "Nitro Hunter' for Belknap, and, produced firearms with over a hundred other trade names. If you wanted your name on a furearm, all you had to do was purchase the tooling to stamp the name and order 10 or more firearms.
Crescent also produced "Nitro Bird" fror Richards and Conover Hardware Company, "Nitro King" for Sears Roebuck and Company, "Nitro Special", and "New York Nitro Hammerless" brands