Photograph - Ruston & Hornsby; Crawler-Mounted Steam Shovel; Lincoln; England; 1923; One of 37 monochrome photographs contained in an album depicting steam-operated; crawler-mounted and rail-mounted mechanical shovels and excavators under test outside the Ruston & Hornsby works at Lincoln and working at a variety of locations throughout the United Kingdom. Part of a collection of photographs; motion picture films; product catalogues; company journals; customer registers