Seiko Cal. 4424 - 537

The 4424-537 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4424 caliber with 20j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-2cba2cde17c4]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1969

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