Seiko Cal. 5639 - 520

Seiko 5639-520

The Seiko 5639-520 represents an important milestone in Seiko's 1997 lineup. Powered by the 5639 caliber with 32j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-541f16691be6]

Also known as: Monster

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
8.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Black
Jewels
32j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1997

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