Gentlemen, You have been very helpful in the past for answering my questions. I am looking at a used 520H that the serial # info was sanded off to paint the pan. This machine has a PTO to Mule Drive plastic cover, no hour meter, foot pads that are not the fine ribbed type but have the wide grooves with buttons holding them down. The lower control knobs are not round but bulb shaped black plastic. The 3 gauges say Toro on them. The top right gauge is a blank black plastic filler. The steering wheel is a three spoke, heavy on the bottom and the wheel is "fat". The mule drive does not have the heavy curved metal shield over the pulleys-possibly a casualty of replacement at one time. The hood is louvered like my 417.