I was looking at information on International 500 crawler/dozers. I see the say "Made in USA". May not be quite correct. Look up the IH factory in Hamilton Ontario, Canada.
Besides building the 500 there they also built the TC-5 and TDC-5 tracked skidder based on the 500 crawler. I have owned a TC-5 gas and still have a TDC-5 diesel version.
This link will clue you in http://www.tractordata.com/farm-tractors/tractor-brands/ih/ih-tractors-factory-sorted.html