Seiko Cal. 5631 - 599

Seiko 5631-599

The 5631-599 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5631 caliber with 36j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-49409603661d]

Also known as: Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
9.3mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
40m
Dial Color
White
Jewels
36j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1985

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seikata-wm-49409603661d