Seiko Cal. 7031 - 231

The Seiko 7031-231 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-1171142a55ca]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1977

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