Seiko Cal. 5635 - 991

The Seiko 5635-991 represents an important milestone in Seiko's 1988 lineup. Powered by the 5635 caliber with 17j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-e848093a2d83]

Also known as: World Timer, Flighty

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1988

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