Seiko Cal. 6634 - 958

The Seiko 6634-958 represents an important milestone in Seiko's 1986 lineup. With its 18mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-29794b847674]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1986

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