Seiko Cal. 6688 - 356

This Spring Drive model from 1972 features a 41mm Hardlex-Coated Steel case. With its 18mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-6b65ee994fe5]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Champagne

Jewels

26j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1972

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