Octagonal copper dial with brass screws, brass bird gnomon, and silvered compass box. Hour scales for 46° and 52° in Roman numerals; scales for 43° and 49° in Arabic numerals. Compass has arrow inscribed to indicate magnetic deviation (20° W).
Material
"L'Ingr.. Chevallier/Opticien du Roi/Vis--vis le [M]arché aux Fleurs/No.. 1 Paris."
