This is a centered-bracket slide-rule dial pointer. It features a 1" x 1/4" mounting base with a 5/8" center bracket assembly aligned between the outer left and right bracket edges. Designed to attach to a tuning dial cord or guide track, it extends a 2-inch indicator needle across slide-rule glass dial scales. This style was commonly used in tabletop radios and consoles manufactured by companies like Philco, Zenith, RCA Victor, General Electric, and Crosley.