Seiko Cal. 6636 - 668

The Seiko 6636-668 represents an important milestone in Seiko's 1972 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-d2bd0bd1e2b2]

Also known as: Bullhead, Rally

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1972

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