Seiko Cal. 6636 - 202

The Seiko 6636-202 represents an important milestone in Seiko's 1988 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-030eb829fb7b]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1988

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