Seiko Cal. 4424 - 660

Released in 1979, the Cal. 4424 with design code 660 was part of Seiko's domestic market collection. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-e1b5575fc0ff]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1979

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