Seiko Cal. 6631 - 987

This Kinetic model from 1976 features a 43mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-31ff475aff33]

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

26j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1976

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