Seiko Cal. 5639 - 422

The Seiko 5639-422 represents an important milestone in Seiko's 1978 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-ec1bee9796c0]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1978

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