CAL. 4R36

42.5 mm diameter stainless steel case - Unidirectional rotating steel bezel with blue and red IP treatment - Screw-down case back with visible movement - 10 bar water resistance - Indexes and spheres with Lumibrite - Hardlex glass - Automatic movement with 3 spheres with day / date - Frequency 21,600 vibrations / hour - 24 jewels - Power reserve of over 41 hours.