All The traditional Sub hallmarks ended up existing in ‘53: the black, luminous dial; the rotating dive bezel; the matching steel bracelet; the screw-down crown. And still. Watch nerds appreciate Christie’s This was mainly a ref. 6538 — it still featured the 200m of h2o resistance, graduated bezel, purple triangle https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/