Seiko Cal. 5644 - 632

The Seiko 5644-632 represents an important milestone in Seiko's 1980 lineup. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-b40dbd8d2db7]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1980

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