Seiko Cal. 5638 - 181

The Seiko 5638-181 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-96eb451a1794]

Also known as: Shogun, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1970

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