Seiko Cal. 5636 - 643

This Quartz model from 1970 features a 37mm Two-Tone case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-bac7ad8333d8]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1970

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