Seiko Cal. 6636 - 664

The Seiko 6636-664 represents an important milestone in Seiko's 1967 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-523bd2a7072f]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1967

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