Seiko Cal. 5640 - 912

This Quartz model from 1967 features a 39mm Gold-Plated case. With its 21mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-f96b1ad42b93]

Also known as: Monster, Sumo

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1967

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