This is a Chisholm Ryder Green Bean Harvester, They where built on IH 856 Hydro, Hydro 70 and Hydro 86 model tractors. They where about a 75 hp. they harvested two rows spaced 36 to 40 inches apart. I drove one in the late 70's early 80's. They are like driving a chevy compared new OXBO 2475 harvester that we use today.