RAYONS CORRESPONDANT Zig Zag Arc Rule
An interesting French boxwood 10 section zig zag rule.
Marked 'RAYONS CORRESPONDANT A UN DEVELOPPEMENT D'ARC DE 24 METRES' and 'CURVUMETRE J.RUE BTE S.G.D.G RAYONS POUR ARC.DE 24 METRES'.
Each section is 22cm long with a total extended length of 2 metres.
Various divisions on each section.
Brass tipped with brass and steel joints.