Seiko Cal. 5637 - 158

This Quartz model from 1968 features a 42mm Titanium case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-2cb7b0bc6bbd]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1968

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