Seiko Cal. 4431 - 388

The Seiko 4431-388 represents an important milestone in Seiko's 1967 lineup. It features a Black dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-dddeaec6ea7b]

Also known as: Samurai

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1967

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