Seiko Cal. 5631 - 239

Seiko 5631-239

The 5631-239 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5631 caliber with 29j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-1fb1523c0492]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
10.1mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1996

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