I have an old rear tine rotary tiller with a 9.2hp Wisconsin AENL engine, 5-12 tires, gear box measures 11 x 22 inches on top and is about 12 inches deep and is chain driven with differential, 3 control levers mounted to handlebars - left lever engages gear box, center lever engages wheels, right lever engages tines - original color appears to be blue, seems to have only 1 forward speed, engine sits on top of gear box and is connected by double v-belts. I can find nothing that would identify the year, make, or model of the tiller. Does anyone have any ideas? Thanks in advance for any help!