Seiko Cal. 4431 - 657

The Seiko 4431-657 represents an important milestone in Seiko's 1995 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-4c27c09755ec]

Also known as: UFO, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1995

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