Brass ruler with different proportional scales and nautical chart divider in a leather case.
All three are in good condition.
On the ruler the scales:
Meters 1:1000 and 1: 2500.
Meters to Pied de Chamb.
Vadems of Savoy 1: 2372
Meters 1: 2372

Catalog: NM.4-15
Date: ca. 1800
L: 20 cm (7.9 in)
Signed: not signed
Origin: French
Condition: very good