Seiko Cal. 5242 - 310

This Spring Drive model from 1976 features a 43mm Stainless Steel case. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-8dfd9a9ece2e]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1976

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