Seiko Cal. 6637 - 103

The Seiko 6637-103 represents an important milestone in Seiko's 1976 lineup. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-5864da260fb1]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1976

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