Seiko Cal. 6640 - 279

This Kinetic model from 1980 features a 39mm Hardlex-Coated Steel case. It features a Navy dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-6cfc67ff1306]

Also known as: Tuna, Rally

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1980

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