A PORTABLE BRASS TRANSIT THEODOLITE, NO. 101 S.G.O., ENGLISH, TROUGHTON & SIMMS, LONDON, EARLY 19TH CENTURY

the setting circle with scale divided 0-360o, vernier and clamp, mounted on the setting circle is a small bubble level, with 64cm telescope with bubble level mounted above the brass ring with three levelling screws



height 47cm