Seiko Cal. 6637 - 568

The Seiko 6637-568 represents an important milestone in Seiko's 1999 lineup. With its 21mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-c2d7af13fbf4]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1999

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