Seiko Cal. 5644 - 307

The Seiko 5644-307 represents an important milestone in Seiko's 1984 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-453397fb94c2]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1984

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