Seiko Cal. 4520 - 539

The Seiko 4520-539 represents an important milestone in Seiko's 1969 lineup. Powered by the 4520 caliber with 17j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-273e62c9e63e]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1969

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