Seiko Cal. 4428 - 152

This Spring Drive model from 1968 features a 36mm Hardlex-Coated Steel case. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-b87439fb3809]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1968

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