LOT OF SIX PROPORTIONAL COMPASSES AND A RULE In engraved brass: - 18th century, anonymous - Early 19th century, anonymous - 18th century, signed ROCHETTE (Gaspard Rochette, active in Paris from 1754 to 1805). - 18th century, anonymous, L. 12 cm. - 18th century, anonymous, L. 16,3 cm. - 18th century, signed "Veuve LENNEL", L. 17,4 cm - Brass ruler engraved with a scale of proportional parts, 18th century. Expert : BOISBAUDRY du Loic