Seiko Cal. 4440 - 948

The Seiko 4440-948 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-7b143592c4cb]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1971

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