Seiko Cal. 5634 - 648

The 5634-648 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-2db15c0b9544]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1978

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