Seiko Cal. 5631 - 558

The Seiko 5631-558 represents an important milestone in Seiko's 1975 lineup. Powered by the 5631 caliber with 27j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-80acd905b527]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1975

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