Seiko Cal. 4423 - 644

The Seiko 4423-644 represents an important milestone in Seiko's 1981 lineup. It features a Navy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-dfe534ad4070]

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1981

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