Seiko Cal. 4428 - 810

This Spring Drive model from 1991 features a 40mm Stainless Steel case. With its 20mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-0c85b0fd3ccb]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1991

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