Seiko Cal. 6688 - 940

The Seiko 6688-940 represents an important milestone in Seiko's 1976 lineup. With its 18mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-ba680b6e633b]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1976

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