Seiko Cal. 5639 - 632

The Seiko 5639-632 represents an important milestone in Seiko's 1976 lineup. Powered by the 5639 caliber with 29j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-5392bcec3a7a]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1976

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