This is a slide-rule base-mounted dial pointer (part #0195). It features a narrow 1" x 1/4" rectangular drive-mounting base designed to attach directly to a tuning cord, slider track, or drive cable, extending a straight 2-inch indicator needle across the glass or illuminated dial scale. This style was commonly used in mid-century tabletop radios, compact receivers, and consoles manufactured by brands like Philco, RCA Victor, Zenith, Emerson, and General Electric.