Seiko Cal. 4431 - 957

The Seiko 4431-957 represents an important milestone in Seiko's 1966 lineup. It features a White dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-b6f0d469168f]

Also known as: UFO, Rally

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1966

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