Seiko Cal. 5631 - 979

Seiko 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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