Seiko Cal. 5638 - 870

The Seiko 5638-870 represents an important milestone in Seiko's 1980 lineup. Powered by the 5638 caliber with 29j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-5e0f8452af3a]

Also known as: Navigator, Sea Horse

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1980

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