A late 19th Century oxidised and lacquered brass theodolite, by Troughton & Simms London, the telescope with rack and pinion focusing, object glass ray shade and dust-slide, graduated bubble levels, cross wire adjusters and eye-piece vertical fine adjustment, the 5 inch vertical circle with silvered scale, two verniers and magnifiers, the tangent screw fine adjuster with clamp, the axis supported on twin A - frames from the horizontal plate with enclosed circle, the chamfered silvered scale with twin verniers and magnifiers, level and cross-bubble, and trough compass, on three-screw tripod stand with adjustable feet, with accessories in mahogany case - 14½in(36.8cm.) wide