Seiko Cal. 6637 - 163

The Seiko 6637-163 represents an important milestone in Seiko's 1985 lineup. With its 18mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-11399ff38969]

Also known as: Bullhead, Rally

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1985

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