Seiko Cal. 5631 - 979

The Seiko 5631-979 represents an important milestone in Seiko's 1985 lineup. Powered by the 5631 caliber with 22j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-770076f294ad]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1985

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