Winding: automatic

Frequency - Variations per hour: 3Hz - 21600 V/h

Power Reserve: 50 hours

Accuracy: -15/+25 seconds / day

Jewels: 23

Service every 6–8years

Calibre Seiko 6R15

Japanese made

Thickness: 5.25

central hr

central min

central sec

Date

Watch brands using this movement: Seiko Alpinist, Fieldmaster, Spirit

Quallity tier: Mid-range

Reliability: High

Notes: Technically strong, slightly pricier