Seiko Cal. 5631 - 139

The 5631-139 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 22j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-483d161be650]

Also known as: Rally, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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