Every One of the traditional Sub hallmarks were present in ‘fifty three: the black, luminous dial; the rotating dive bezel; the matching metal bracelet; the screw-down crown. And still. Watch nerds appreciate 3035 supplied a quickset day wheel, although the reference is considered a “transitional” watch for the subsequent rationale: https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/