Seiko Cal. 6635 - 688

This Spring Drive model from 1969 features a 43mm Stainless Steel case. With its 21mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-b29cb444bf54]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1969

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