Seiko Cal. 5644 - 644

The Seiko 5644-644 represents an important milestone in Seiko's 1974 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-a3da7cfc2d59]

Also known as: Samurai, Sea Horse

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1974

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