Forstner Jewelry started sometime in the 1920's as Forstner Chain Corporation in Irvington, NJ and produced Jewelry until sometime in the 1980s. Many of it's styles were produced in Gold Filled and Sterling. They are not easily found. The company marked it's designs under many different collection names. Some of their known marks are Fortune, Snap-Lock, Trustyle; Dapper, F.C.C., Forsit, Dubl-Lock, Initials W&F with a star between inside elongated hexagon, Radio (ca. 1920), Numum (ca. 1923), Image of a Carrousel (ca.1935), Climatest (ca. 1949), Bolita (ca. 1950), Forstar (ca. 1950), Remembrance (ca.1954), Teenette (ca. 1958), Backward "F" with arrow through the center (ca.1962) and Token of Love (ca.1965). Many thanks to IllusionJewels.com for sharing this information.