Seiko Cal. 4428 - 938

The Seiko 4428-938 represents an important milestone in Seiko's 1968 lineup. With its 22mm lug width and 14.7mm profile, it sits comfortably on most wrists. [seikata-wm-6c99f8be4759]

Also known as: Sumo, Bullhead

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1968

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