Seiko Cal. 6688 - 645

This Spring Drive model from 1998 features a 43mm Stainless Steel case. With its 21mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-469cdad958f0]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1998

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