ZENITH EL PRIMERO CHRONOGRAPH NO. 860D7XX YELLOW GOLD WRISTWATCH ZENITH EL PRIMERO GOLD CHRONOGRAPH NO. 860D7XX 18kt yellow gold form case, screw-down case back, crown marked, pump buttons, cream dial with three contrasting counters, black graphics, applied hour markers, seconds at nine o'clock, date window between four and five o'clock, self-winding movement cal 3019 PHC, non-original brown leather strap, gold-plated buckle marked Zenith, plastic crystal, gr. 76. Diam. mm 36