Seiko Cal. 6688 - 139

The Seiko 6688-139 represents an important milestone in Seiko's 1986 lineup. With its 22mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-3901becf9f23]

Also known as: Helmet, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1986

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