Seiko Cal. 7139 - 731

The Seiko 7139-731 represents an important milestone in Seiko's 1977 lineup. It features a Green dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-046a354e6cb2]

Also known as: Tuna, Arnie

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1977

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