Seiko Cal. 3817 - 918

This Quartz model from 1971 features a 41mm Stainless Steel case. Powered by the 3817 caliber with 23j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-169c33a62f08]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

23j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1971

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