Sub 300 ProfessionalIn 1967, DOXA launched the revolutionary SUB concept, considered to be the first truly purpose designed divers watch accessible toa 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 to calculate a safe ascent without