Seiko Cal. 4430 - 840

The Seiko 4430-840 represents an important milestone in Seiko's 1981 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-78a2d9be2508]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1981

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