Seiko Cal. 6635 - 412

The Seiko 6635-412 represents an important milestone in Seiko's 1989 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-a0383b04248e]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1989

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