Seiko Cal. 5688 - 641

The Seiko 5688-641 represents an important milestone in Seiko's 1968 lineup. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-e72525035d07]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1968

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