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: Akahane presented the technology at Baselworld in 1998, but he passed away later that year at age 52, never seeing the first commercial release in December 1999. 3. How It Works: The Tri-Synchro Regulator

Unlike mechanical watches that use a ticking "escapement," the Spring Drive uses a . What is Seiko Spring Drive? | WATCH EDUCATION buy seiko spring drive

Making this "braking" system work without a battery was thought to be impossible. : Akahane presented the technology at Baselworld in