plannerphil

This is my JDM Seiko Majesta with the rare 5S42 viscous-sweep quartz movement. The second hand sweeps perfectly smooth. Compared to Spring Drive, it's a much better fit for my slender wrist. It's also way less expensive.

#seiko #quartz
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relyt29
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Wow this is sweet. I wonder why they discontinued these, they're so rare

plannerphil
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"This paper describes a new quartz watch driving system we developed. With this system, the second hand of a wrist watch moves smoothly as if it is sweeping. An intermittent movement of the stepping motor is transferred to a smooth sweeping motion due to the spiral spring and the viscous regulator. This system also allows the continued superiority of quartz watches." (emphasis added) - Shigeru AOKI, Osamu MIYAZAWA, Osamu TAKAHASHI (Seiko Epson Corp.)

https://www.jstage.jst.go.jp/article/tokeieafj/129/0/129_KJ00001679598/_article/-char/en