Got a 646 yesterday. With 3pt reversible pto and a tiller. PO said last he knew the hour meter worked showing 200hrs on 73 or 74 could only remember first 3 of serial number. He hadn't started it in couple of years. It developed a real bad hydraulic leak in the area of the pump. Only thing I've seen that somebody hacked up is they welded pins on the tiller to mount it on the 3pt and someone did real bad job of trying to paint it all red, it has mostly wore off. It even has the tower cover. I'll try get some pics today