Seiko Cal. 6643 - 929

The Seiko 6643-929 represents an important milestone in Seiko's 1966 lineup. Powered by the 6643 caliber with 30j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-3bf23edffeb7]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1966

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