Seiko Cal. 4590 - 522

The 4590-522 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4590 caliber with 20j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-0edfb2b3491b]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1974

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