Seiko Cal. 5639 - 737

The Seiko 5639-737 represents an important milestone in Seiko's 1976 lineup. Powered by the 5639 caliber with 29j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-eea8bd292fcc]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1976

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