Seiko Cal. 4520 - 339

The Seiko 4520-339 represents an important milestone in Seiko's 1971 lineup. Powered by the 4520 caliber with 24j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-27b542b3d6a1]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1971

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