Seiko Cal. 6690 - 681

The Seiko 6690-681 represents an important milestone in Seiko's 1980 lineup. With its 22mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-a33b5287a5f9]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1980

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