Seiko Cal. 4424 - 646

The Seiko 4424-646 represents an important milestone in Seiko's 1978 lineup. With its 19mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-4ed65065bc06]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1978

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