Seiko Cal. 4520 - 150

This Spring Drive model from 1967 features a 39mm Hardlex-Coated Steel case. Powered by the 4520 caliber with 23j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-b3f9d83eb595]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1967

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