Seiko Cal. 7140 - 956

This Spring Drive model from 1988 features a 38mm Hardlex-Coated Steel case. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-1a7b8cdb0cb8]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1988

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