Seiko Cal. 5666 - 790

The Seiko 5666-790 represents an important milestone in Seiko's 1984 lineup. Powered by the 5666 caliber with 31j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-5f8de8b82d2d]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1984

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