Seiko Cal. 5638 - 699

The Seiko 5638-699 represents an important milestone in Seiko's 1976 lineup. Powered by the 5638 caliber with 34j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-412b4b76a828]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1976

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