Seiko Cal. 6643 - 844

The Seiko 6643-844 represents an important milestone in Seiko's 1984 lineup. With its 21mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-749e77643cbe]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1984

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