Seiko Cal. 7128 - 375

This Spring Drive model from 1976 features a 40mm Stainless Steel case. With its 21mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-a01ce6d84c42]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1976

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