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Engine indicator.

Watt's Steam Engine indicator of very late form

Steam engine indicator by Casartelli

1884

Steam Engine Indicator

1870-1890

Richards' Steam Engine Indicator

Steam Engine Indicator

1899
Steam engine indicator made by Crosby Steam Gage and Valve Company, Boston. Date made about 1895. Recording drum 900mm x 460mm diameter

Steam engine indicator made by Crosby Steam Gage and Valve Company

1890-1900
Steam engine indicator made by Dobbie McInnes Ltd, Glasgow, c.1908 and used at Joshua Hoyle & Sons, Derker Mills, Oldham.

Steam Engine indicator by Dobbie McInnes Ltd

1908
"New" continuous drum steam engine indicator and 1 stroke reducing gear

"New" continuous drum steam engine indicator

Steam engine indicator made by Joseph Casartelli & Son Ltd, Manchester, England.

Steam engine indicator by Casartelli

Steam engine indicator, Richards', in fitted mahogany case, by Elliott Bros., London, c1910.

Steam engine indicator

1910
Steam engine indicator, Ashcroft manufacturing Company, Bridgeport USA, Number 3224. Nickel plated all over, vertical drum pencil arm, blued steel, 5 share spring, screwdriver, scales, paper in box.

Steam engine indicator

Hopkinson Steam Engine Indicator with accessories in wooden box

Hopkinson steam engine indicator