Seiko Cal. 4520 - 300

This Hand-Winding model from 1983 features a 41mm Hardlex-Coated Steel case. With its 18mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-ec126cd188df]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1983

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