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
TECHNICAL SPECIFICATIONS
Movement Type
Quartz
Display Type
Analog
QUICK FACTS
FOR WATCH DEALERS
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