Bremont watch supermarine s300bl a true divers instrument this bremont supermarine s300 watch was designed by bremont founders nick and giles english to be an amphibious watch they wanted to create a timepiece that not only linked back to their aviation roots but was also a beautiful and effective piece of diving equipment the exquisite manufacturing of this bremont watch means that it has an impressive water resistance of 300 metres this bremont supermarine s300 watch continues to imp