Seiko Cal. 5638 - 504

The Seiko 5638-504 represents an important milestone in Seiko's 1986 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3fb3840caca9]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1986

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