Power Wheels Magazine A Notch Above

The Seiko Caliber 6309 automatic movement is famous not only as a rugged and reliable workhorse for the Japanese watchmaker’s extensive mechanical wristwatch model lineup, but also for its military pedigree. It powered the legendary 1976-1988 Seiko 6309 “Turtle” Diver’s Watch that was widely used by U.S. Navy SEALs and Special Forces in the post-Vietnam era. Despite being a civilian ...

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