Steam engine indicator by Casartelli
1884
Engine indicator.
Richards' Steam Engine Indicator
Steam Engine Indicator
1870-1890
Steam Engine Indicator
1899
Steam Engine indicator by Dobbie McInnes Ltd
1908
Steam engine indicator made by Crosby Steam Gage and Valve Company
1890-1900
"New" continuous drum steam engine indicator
Steam engine indicator by Casartelli
Steam engine indicator
1910