Seiko Cal. 7139 - 784

This Automatic model from 1981 features a 37mm Hardlex-Coated Steel case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-f179eb54cb27]

Also known as: Monster, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1981

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