Surveyors' compensation bar
1920-1950
Pair of compensation bars and accessories - two trestles, microscope, two tripods, two microscope supports, plus screws and foot plates, unknown maker, British, 1920-1950
1920-1950
1920-1950
1920-1950
1920-1950
1920-1950
1920-1950
1920-1950
1920-1950
1920-1950