A rare 19th Century brass theodolite, signed on the horizontal circle Richer a Paris, the primary telescope with cross hairs, on twin tapered triangular supports, with segmental arc divided 50°-0°-50°, vernier scale, the horizontal wheel circle, divided 0°-350° and 10°-350°, with index arm, twin verniers, tangent screw and clamp, inset compass box with silvered dial, bubble and cross bubble level, over secondary telescope on universal ball and socket staff mount - 13¾.in.(35cm)high; and a turned mahogany stand