Seiko Cal. 4428 - 223

This Spring Drive model from 1976 features a 35mm Titanium case. With its 18mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-45197c0abb24]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1976

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