A 19th century oxidised and lacquered brass theodolite signed on the silvered compass dial CHADBURN & SON LIVERPOOL, the telescope with rack and pinion focusing, lens hood, dust slide, and graduated bubble level, the axis with vertical circle raised on twin A-frame supports, the silvered scale divided in four quadrants with two verniers and magnifiers, the horizontal plate with level, cross-bubble, compass box with edge-bar needle over the chamfered silvered horizontal circle with two verniers and single magnifier on three screw adjustable mounting and tripod support, in fitted mahogany case - 15ins(38.3cm)wide