Seiko Cal. 7143 - 831

The Seiko 7143-831 represents an important milestone in Seiko's 1975 lineup. Powered by the 7143 caliber with 31j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-739bd23395c7]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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