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
Steam Locomotive Indicators, Crosby indicator in wooden box. Used for measuring steam pressure in cylinders. Marked "Trademark Crosby". 8 3/4"x6 3/4"x4 3/4" Crosby steam locomotive indicator
Steam Locomotive Indicators, two Crosby Indicators in wooden case marked: "Crosby Steam Gage & Valve Co. Boston Pat'd Sept.2 1829". Used for measuring steam pressure in cylinders. Two steam locomotive indicators