Seiko Cal. 5640 - 543

This Kinetic model from 1977 features a 35mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-3ffcb6ce9209]

Also known as: Silverwave, Sea Horse

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1977

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