Seiko Cal. 6635 - 658

The Seiko 6635-658 represents an important milestone in Seiko's 1976 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-4838099b53b1]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1976

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