At some point (I think the early to mid-1920s) H&D Folsom switched over from using the American Gun Co. name to using the Crescent Fire Arms Co. name for their American-made entry level guns. From the parts lists I have the American Gun Co. guns used a coil mainspring on a follower while the Crescents used a bent piece of spring wire as a crude approximation of a V-Spring. Crescent was an old name from before the turn-of-the-century when they made guns that were a cut above the later offerings of that name. The only early Crescents I ever saw were from the late Russ Ruppel.