Seiko Cal. 5640 - 627

The 5640-627 is a sought-after Kinetic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-bb8a790f0bcf]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

36mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1981

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