A black enamelled and lacquered brass theodolite, signed on the horizon ring R.my Bianchi 47 rue des Postes a Paris, the primary telescope with rack-and-pinion focusing, dust cap, located to the vertical circle pillar, the axis supporting vernier scale and magnifier, the arc with silvered scale, over horizontal circle revolving on central column, with independantly revolving twin verniers and magnifiers, graduated bubble level and tangent screw and clamp, the pillar mount supporting secondary telescope with rack-and-pinion focusing, on horizontal revolving plate over tripod foot with levelling screws - 12in.(30.5cm)high