Seiko Cal. 4439 - 425

The Seiko 4439-425 represents an important milestone in Seiko's 1976 lineup. It features a White dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-7be606448029]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1976

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