Signed "par Ingénieur Chevallier Opticien du Roi et des Princes/ Tour de l'horloge au Palais N° 1. Vis-à-vis/ le Marché aux fleurs. A Paris"
France.
19th century.
After Torricelli (1608 - 1647).
The "ingénieur" Chevallier was the optician of the king of Westphalia, brother of Napoléon I. Jérôme Bonaparte (1784 - 1860), French prince and Imperial Highness. He became the king Jérôme Napoléon, French prince, king of Westphalia from 1807 to 1813.