Seiko Cal. 5688 - 662

This Spring Drive model from 1973 features a 36mm Stainless Steel case. With its 19mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-b2246a319124]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1973

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