Seiko Cal. 4428 - 816

The Seiko 4428-816 represents an important milestone in Seiko's 1980 lineup. It features a Black dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-e14f8eab92dd]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1980

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