I know it's not quite antique from a purest perspective but it is the last incarnation of the old school Cat built machines. The "D" model came with high pressure (XT-5) hydraulic systems and were fast for their day. I just log for personal use now but it sure is fun to know you can call yourself an actual "professional tree killer". Here is a link to the Vid:https://www.youtube.com/watch?v=QV5WlfM9tD0