Seiko Cal. 5637 - 939

This Spring Drive model from 1967 features a 38mm Titanium case. With its 20mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-61d4c69ed422]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1967

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