The Seiko 5S21A is a quartz movement introduced in 1988 and now discontinued. It features a smooth sweeping seconds hand—a notable feature for a quartz movement—achieved through an intermittent stepping motor with spiral spring and viscous regulator. The rectangular movement uses an SR920SW battery and was manufactured in Japan.
TECHNICAL SPECIFICATIONS
Movement Type
Quartz
Display Type
Analog
Winding
Quartz (Battery)
FEATURES
Sweep Seconds
More Seiko movements
QUICK FACTS
FOR WATCH DEALERS
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