Doxa Watch SUB 200 C-Graph Professional Rubber 798.10.351.21. The Doxa watches SUB 200 C-Graph. The case, made of highest quality 316L stainless steel has a diameter of 45mm and features a unidirectional rotating bezel. The screw down crown further ensures water resistance to 200m. Under the dome shaped, scratch resistant sapphire glass box crystal, all dive related indications on the dial are treated with a Super LumiNova luminescent coating to ensure optimum legibility under low visibility conditions. The Swiss automatic movement offers a power reserve of approximately 48 hours.