Seiko Cal. 5639 - 881

The Seiko 5639-881 represents an important milestone in Seiko's 1972 lineup. Powered by the 5639 caliber with 19j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-8d7c91c2c5e7]

Also known as: Sumo, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

19j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1972

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