Seiko Cal. 5666 - 397

The Seiko 5666-397 represents an important milestone in Seiko's 1985 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-90414a72cb8e]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1985

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