Seiko Cal. 5666 - 940

The Seiko 5666-940 represents an important milestone in Seiko's 1988 lineup. It features a White dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-a612964908d8]

Also known as: Sumo, Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1988

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