Every One of the vintage Sub hallmarks had been current in ‘fifty three: the black, luminous dial; the rotating dive bezel; the matching steel bracelet; the screw-down crown. And but. Watch nerds love Christie’s This was mostly a ref. 6538 — it even now highlighted the 200m of h2o resistance, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/