1965 marks the beginning of Seiko’s diving watches history, with the release of their first diver’s watch. For 6 decades, the Japanese company has been pushing back the boundaries of performance to follow professional divers standards. Their successive innovations helped improving their watches’ security, liability and legibility. This year, for the 60th anniversary of the collection, Seiko released 3 new Prospex models. For this occasion, Frank Sans C’s crew didn’t hesitate to roll up their sleeves and engage in proper testing. Marseilles, here they come!