A 19th-Century lacquered brass theodolite, signed Troughton & Simms London, the telescope with rack and pinion focusing, dust cap, cross wire adjustors and bubble level, located in twin clamps, on the limb engraved T.S. TEW, with axis and vertical half-circle, with silvered scale and vernier, fine tangent screw adjustment, on twin Vee-suppports over the horizontal plate incorporating a level and cross-bubble, silvered compass dial with edge-bar needle, agate cap and clamp, the silvered chamfered horizontal circle with two verniers, single magnifier, tangent screw adjustment and clamp, on 4 screw tripod mounting, in mahogany case - 11¾ins. (29.8cm.) wide.