Seiko Cal. 5631 - 658

The Seiko 5631-658 represents an important milestone in Seiko's 1967 lineup. Powered by the 5631 caliber with 32j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-47244256b28b]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1967

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