Seiko Cal. 5666 - 988

The Seiko 5666-988 represents an important milestone in Seiko's 1998 lineup. Powered by the 5666 caliber with 23j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-d67f0e261244]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1998

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