Seiko Cal. 4431 - 257

The Seiko 4431-257 represents an important milestone in Seiko's 1979 lineup. It features a White dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-4284c2b10f0c]

Also known as: Monster, Silverwave

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1979

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