A brass dual purpose surveying instrument, simple theodolite/circumferentor with central compass dial the decorated compass rose signed Tho. Wright inftrument maker to Ye Prince the inner compass ring divided into quadrants numbered 10-80 intejected by compass points the outer numbered 10-360, six arms support outer ring numbered 10-360, with two verniers (lacking sights) on marked with scale min 0-60 on central tripod mount -- 12¼in.diam