Seiko Cal. 6388 - 578

This Spring Drive model from 1977 features a 43mm Hardlex-Coated Steel case. With its 18mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-c4312eea2503]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1977

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