Brass telescope with two optical elements, one of which is a telescope with its covers (a small accident to a screw thread). Signed Secrétan Paris and numbered 351. Three telescopic legs (reported). Travelling case. End of the 19th century. Bezel : Length : 124 cm - Diameter : 11,5 cm Base : Height : 108 cm. 108 cm A Parisian firm founded in 1789, LEREBOURS et SECRÉTAN, specializing in astronomical and scientific optical instruments, was one of the main suppliers to the Observatory and the Ministries. In 1866, the famous astronomer Camille FLAMMARION had his first telescope built there.