Seiko Cal. 5257 - 643

The Seiko 5257-643 represents an important milestone in Seiko's 1974 lineup. It features a Green dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-aa5c39a9031e]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1974

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