How do you find information on Victor Plain American shotguns?

Victor and Knickerbocker were Crescent-Davis (circa 1888 to about 1940) "utility" guns manufactured for various hardware stores, retail outlets, and H & D Folsom Sporting Goods of New York City.

Serial numbers don't help much on these - no one has ever tried to determine the method Crescent used to assign them or research original records (probably none exist) - but it would have been made somewhere between 1893 and 1932.

Value is in the neighborhood of $85-150 unless it is in absolutely new condition. Of course, if it is broken/worn out/rusted it will be worth little or nothing.