Seiko Cal. 4428 - 387

This Spring Drive model from 1988 features a 37mm PVD Black case. With its 20mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-8ca7c3c73487]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1988

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