Seiko Cal. 5638 - 650

The 5638-650 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-6cf5a80364e2]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1985

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