Seiko Cal. 5634 - 738

The 5634-738 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5634 caliber with 18j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-ae6e8dfc8d08]

Also known as: Rally, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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