Seiko Cal. 6668 - 990

The Seiko 6668-990 represents an important milestone in Seiko's 1985 lineup. Powered by the 6668 caliber with 18j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-e8f46360326c]

Also known as: Sumo, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1985

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