Seiko Cal. 5631 - 645

This Kinetic model from 1980 features a 40mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-083788d48a68]

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1980

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