Seiko Cal. 7140 - 156

The Seiko 7140-156 represents an important milestone in Seiko's 1979 lineup. With its 20mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-8a0ebb9bdd4c]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1979

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