Seiko Cal. 7031 - 391

The Seiko 7031-391 represents an important milestone in Seiko's 1979 lineup. Powered by the 7031 caliber with 26j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-4e9c771ca1ae]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1979

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