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Seiko 4N30

QuartzIn ProductionIn-house

The Seiko caliber 4N30 is an in-house quartz movement manufactured in Japan. It features a rectangular profile with a time-only, 2-handed display and contains zero jewels, powered by an SR521SW battery. The movement belongs to Seiko's 4N family of rectangular movements, which are typically used in the brand's tank-style watches.

Last updated 29 Apr 2026Suggest a correction