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Seiko Caliber 4M21

Watch Blogs1 year ago

Manufacturer Seiko Caliber Number 4M21, 4M21A Movement Type Kinetic (AGS), quartz Lignes 11.5”’ Diameter 25.6mm Height 2.7mm Jewel Count 9 Frequency 32,768 Hz Accuracy Rating +/- 15 seconds/month Capacitor 30274MZ,

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