Seiko Cal. 6628 - 380

This Spring Drive model from 1990 features a 34mm Stainless Steel case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-16a762c81349]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1990

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