Seiko Cal. 5640 - 812

This Solar model from 1968 features a 37mm Gold-Plated case. With its 21mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-114699141640]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1968

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