Seiko Cal. 5639 - 131

Seiko 5639-131

The Seiko 5639-131 represents an important milestone in Seiko's 1997 lineup. Powered by the 5639 caliber with 17j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-38e698b0f4a6]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
13.7mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Green
Jewels
17j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1997

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