No 253/300. Key SpecificationsCase Size: 39mm. Dial: Lucerne Blue polished lacquer with Super-LumiNova Grade X1 BL C1 indexes and a date window at 6 o'clock. Perfect all rounder 1 watch collection- similar in style to the Rolex oyster perpetual, classic tool watch styling but the famous CW light catcher case and polished hour markers giving the watch more presence.