Seiko Cal. 7031 - 231

The Seiko 7031-231 represents an important milestone in Seiko's 1999 lineup. Powered by the 7031 caliber with 29j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-f414a82883f8]

Also known as: Sumo, Arnie

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1999

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