My first thought was Crescent based on sheer numbers made, with the name being whatever a hardware store wanted on it, BUT, there are lots of other possibilities given the location. I tried some online searches using CCW, CEM, x-whatever and got nothing.
Maybe someone will recognize that interesting design, I know I'm not familiar with it.
Norwich was a busy place...
"Firearms
Norwich was considered "the firearms center of New England" from the Civil War to the Depression. It is said that in 1860, more firearms were made in Norwich than in any other city during the War Between the States. Manufacturers included: Bacon Arms Co.; Norwich Arms Co.; Norwich Nickel & Brass; CC. Brand; Whaling Gun; Cole & Walker, Machinists; Alvah Grimes, Gunsmith; Osgood Gunworks (also known as Norwich Pistol Co.); Hood Firearms Co.; Thomas E. Ryan, Gunmaker; Davenport Firearms Co.; Crescent Firearms Co.; Manhattan Arms Co.; Ethan Allen and Charles Hurber; Tobin Arms Co.; Hopkins & Allen. The most recognizable name in Norwich gun manufacturing was Smith & Wesson, which began on Central Wharf in Norwich, later moving to New Haven when the popularity of patented revolvers required a larger facility. The last of the guns and ammunition manufacturers closed in 1931, but the Guns of Norwich Historical Society is helping to preserve that part of the City's heritage."
