Seiko Cal. 6643 - 599

The Seiko 6643-599 represents an important milestone in Seiko's 1983 lineup. Powered by the 6643 caliber with 33j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-d47bc7cd4ee7]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

33j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1983

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