Ruston Lincoln badged as Ruston Hornsby flat belt drive compressor with one drive pulley and one idle pulley this has been on the property since the late 1930s and was moved into a smaller shed in the early 1960s and driven with a single phase 1HP motor with a standard V belt which works fine on the flat pulley. Motor gave up 12 months ago but compressor still runs fine. Its heavy but have lifting equipment on site.