Seiko Cal. 5641 - 931

The Seiko 5641-931 represents an important milestone in Seiko's 1967 lineup. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-39ea986fe835]

Also known as: Navigator, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1967

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