A 19th-Century brass surveying level, signed G & C DIXEY Opticians to the King 3 New Bond St LONDON, on the silvered dial with edge-bar needle, jewelled cap and clamp, the compass supported on 4 tapering pillars over the telescope with rack and pinion focusing, the graduated bubble level and cross wire adjustors, on 4 screw tripod attachment, with makers trade label, in mahogany case - 17¼ins. (43.8cm.) wide.