Seiko Cal. 5639 - 632

Seiko 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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