Jean Cras Ruler

The Jean CRAS TOPOPLASTIC rule is approved by the Merchant Navy, the National Navy, Civil Aviation, and the Air Force.

All the rules manufactured in our workshops are made with hot engraving on high-quality plexiglass or PVC, which guarantees excellent longevity.

Only the TOPOPLASTIC Company holds the rights to the name Jean CRAS.

Features: Jean Cras Rule

1990002: Jean Cras Evolution Rule

A modern version of the famous navigation rule invented by Admiral Jean Cras in 1917.
The new EVOLUTION version features a much clearer layout and avoids the inevitable mistakes of novices.
Two-colour engraving on 1 mm PVC.
Length: 385 mm.

29520: Cras Rule, Two-Colour Version

Black graduations, 2 scales.

Dimensions: 385 x 100 mm

 29519: Cras Rule, Black Version

Black graduations, 2 scales.

Dimensions: 385 x 100 mm