Seiko Cal. 4428 - 139

This Spring Drive model from 1968 features a 38mm PVD Black case. With its 19mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-9d65357644b9]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

34j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1968

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