Seiko Cal. 4428 - 675

This Spring Drive model from 1976 features a 37mm Two-Tone case. With its 18mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-7b6b99d13c50]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1976

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