Seiko Cal. 7031 - 507

The Seiko 7031-507 represents an important milestone in Seiko's 1967 lineup. Powered by the 7031 caliber with 29j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-893d107c2e6c]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1967

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