Seiko Cal. 6643 - 345

The Seiko 6643-345 represents an important milestone in Seiko's 1965 lineup. Powered by the 6643 caliber with 25j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-4119ee1b58ba]

Also known as: Turtle, Navigator

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1965

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