Seiko Cal. 6688 - 564

This Quartz model from 1977 features a 36mm Hardlex-Coated Steel case. It features a Green dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-b8e8bd5722a2]

Also known as: Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1977

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