Seiko Cal. 7031 - 403

The Seiko 7031-403 represents an important milestone in Seiko's 1972 lineup. With its 18mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-9fbdb2baae1a]

Also known as: Sumo, Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1972

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