Seiko Cal. 4528 - 721

This Hand-Winding model from 1980 features a 43mm Titanium case. With its 21mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-cc418b5dd63e]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1980

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