Seiko Cal. 7028 - 641

This Spring Drive model from 1975 features a 36mm Stainless Steel case. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-d10d90b882d0]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1975

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