Gregorian Reflection Telescope Signed Navarre In Paris C.1750

An Reflection Telescope Signed Navarre In Paris C.1750Reflection telescope mounted on brass base, signed “Navarre A Paris”. Both mirrors are in good condition, The telescope has a brass with leather objective tube, (l18 cm, Ø 5 cm), with main mirror ( Ø 4,1 cm), second mirror ( Ø 1,1 cm) dust cap. Two compound oculars (l 6 cm, Ø 2 cm) are available with a dust cap. Supported by a bracket above a universal ball joint on a turned brass base with the oppertunity to remove the base and screw the telescope on a wooden stick.Navarre was Ordinary Engineer in instruments of physics and mathematics privileged of Monseigneur the Duke of Burgundy (Grand eldest son of Louis XIV). Pupil of Dom Noel (signature on a small telescope ). He worked with him on the construction of a large telescope financed by Louis XV. Navarre specialized in the manufacture of Gregorian telescopes, he presented several at the Academy in 1769 and 1778.