Seiko Cal. 6635 - 139

This Quartz model from 1977 features a 39mm Hardlex-Coated Steel case. It features a Green dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-09b958cd09ab]

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1977

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