Seiko Cal. 5691 - 451

The Seiko 5691-451 represents an important milestone in Seiko's 1966 lineup. With its 21mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-e2bc83bcb359]

Also known as: Monster, Navigator

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1966

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