Seiko Cal. 3817 - 694

This Quartz model from 1981 features a 41mm Hardlex-Coated Steel case. Powered by the 3817 caliber with 20j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-c944e2f212eb]

Also known as: Sumo, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1981

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