The B-42 MARINEMASTER is one of the most prestigious FORTIS ranges of models, established already in the 40’s. Like its historical forerunner the latest model line the B-42 MARINEMASTER collection, which offers a Day/Date, Chronograph and the C.O.S.C. certified Chronograph Alarm, feature highly precise Swiss mechanical movements with automatic winding. It fulfils all requirements of professional sports watches.