Measure old theodolite by Bianchetti in Marseille

Measuring instrument former Theodolite by Bianchetti in Marseille, noted that ' the lacks the eyecup and the adjustment system. For information a theodolite is an instrument of Geodesy full of an optical instrument, measuring angles in both horizontal and vertical planes to determine a direction. It is used to carry out the measures of a triangulation: measure of the angles of a triangle. It is an essential instrument in topography and engineering. Surveyors are their main instrument in the field. Dimension height 28 cm by 21 cm of length.