Seiko Cal. 4431 - 727

The Seiko 4431-727 represents an important milestone in Seiko's 1982 lineup. It features a Navy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-8ad42bb62568]

Also known as: Helmet, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1982

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