Seiko Cal. 3813 - 920

This Quartz model from 1976 features a 37mm Stainless Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-964db61e2895]

Also known as: Helmet, Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1976

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