Seiko Cal. 6637 - 769

This Quartz model from 1981 features a 35mm Two-Tone case. With its 22mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-fdbccd936520]

Also known as: Tuna, Silverwave

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1981

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