This is a double-end mount slide-rule dial pointer (part #121105-1). It features two end-mounting brackets measuring 1/4" x 3/8" each, positioned at opposite ends of a long 4 5/8-inch indicator shaft. Designed to attach dual drive cords or top-and-bottom guide tracks, it provides stable horizontal or vertical movement across wide slide-rule glass dial scales. This style was commonly used in larger tabletop radios and console receivers manufactured by companies like Philco, Zenith, RCA Victor, General Electric, and Crosley.