Seiko Cal. 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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