Seiko Cal. 5631 - 258

The Seiko 5631-258 represents an important milestone in Seiko's 1968 lineup. Powered by the 5631 caliber with 31j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-ea6df55a2aff]

Also known as: Silverwave

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1968

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