Seiko Cal. 6638 - 726

The Seiko 6638-726 represents an important milestone in Seiko's 1991 lineup. With its 22mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-5bd252fef2ee]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1991

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