A Diamond Clip Watch, by Cartier

The rectangular dial with Roman numerals and blue steel hands, within a frame and surmount of rose-cut and single-cut diamonds. French assay marks for platinum. Dial signed Cartier, case numbered 21173 and 12946. Manual movement and case back signed E.W & C. Co. Inc., numbered 21173 and 12946. Measurements 3cm x 1.5cm.