Zenith Rainbow, steel/gold, automatic, chronograph, Ref. 53-0370-400 circa 1990, unidirectional rotating gold bezel with dark blue inlay, screw back, crown and pushers, sapphire crystal, metallic blue dial with wedge indices, new luminous hands, date between 4 and 5 o'clock, sub-dials for second, 30 min and 12 hour counter, central stop second, El-Primero movement running, steel/gold bracelet with butterfly clasp, diameter 40mm, height 13mm, length approx. 20cm plus 2 spare links, with box and box and pendant