Seiko Cal. 6636 - 987

The Seiko 6636-987 represents an important milestone in Seiko's 1989 lineup. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-7fa646cb003d]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1989

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