Seiko Cal. 6635 - 451

The Seiko 6635-451 represents an important milestone in Seiko's 1967 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e82294257005]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

26j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1967

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