Seiko Cal. 5631 - 580

This Kinetic model from 1968 features a 37mm Gold-Plated case. With its 18mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-da23dac7c3f4]

Also known as: Sumo, Emperor

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1968

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