Seiko Cal. 5666 - 390

The Seiko 5666-390 represents an important milestone in Seiko's 1982 lineup. It features a Silver dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-1c304a3ba471]

Also known as: Sumo, Bullhead

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1982

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