Seiko Cal. 5631 - 986

The Seiko 5631-986 represents an important milestone in Seiko's 1990 lineup. Powered by the 5631 caliber with 29j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-27ca36fc5c53]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1990

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