DOXA - SUB 300 - CARIBBIANDOXA SUB 300 CARIBBIAN 821. 10. 201. 10 In 1967, DOXA launched the revolutionary SUB concept, considered to be the first truly purpose designed divers watch accessible to a broader public. The radical innovations it introduced at the time soon made it the benchmark for professionals, too. Water resistant to 30 bar, roughly equivalent to a depth of 300 meters, it was the first to feature a unidirectional bezel with a dual scale for depth and dive time