Seiko Cal. 6631 - 770

This Kinetic model from 1969 features a 35mm Titanium case. With its 20mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-8e43b573dc03]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

35mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1969

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