Antique brass theodolite surveying device manufactured by William Wilton, St. Day, Cornwall, featuring a 4.75″ diameter silvered compass dial with brass cover, 13″ long scope, bubble level, and adjustable base. Includes a wooden case with hinged lid, measuring 14″ x 12″ x 9″. In very good to fine condition. Theodolites are precision instruments used by land surveyors to measure horizontal and vertical angles. An appealing, well-crafted antique brass precision instrument.