Seiko Cal. 6631 - 954

This Spring Drive model from 1972 features a 36mm Titanium case. With its 18mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-07cf59c9ba29]

Also known as: Turtle, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Cream

Jewels

19j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1972

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