Seiko Cal. 6643 - 783

The Seiko 6643-783 represents an important milestone in Seiko's 1974 lineup. Powered by the 6643 caliber with 34j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-ba62965ff950]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1974

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