Seiko Cal. 5631 - 879

Seiko 5631-879

The 5631-879 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5631 caliber with 18j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-b09cf0fd2c8c]

Also known as: Silverwave, Navigator

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
43mm
Case Thickness
8.8mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Silver
Jewels
18j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1992

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seikata-wm-b09cf0fd2c8c