In 1968, three years after the brand?s first dive watch was released (the 62MAS or Reference 6217-800x with 150-meter water resistance), Seiko?s engineers managed to raise the bar with a Hi-Beat divers? watch with 300-meter water resistance (Reference 6159-700x). This model was not only the first dive watch to be equipped with a 10-beat high-precis...
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