Purdue used to have several Oliver tractors as there was a dealer about 12 miles away from the University, they probably put in the low bid and  was granted the deal. I graduated from Purdue in 2001. At that time, they still had two 1755's (one gas and one diesel-both with ROPS and fender fuel tanks.) They did still have them last year as I was at the animal science farm with a group of students for a tour. They used them a lot for silage and manure hauling.I have a picture I shot one time of them when we were out there for a class of both on spreaders as I recall. They also have a couple of the little Fiat Ollies too. If I could get near a scanner, I could send you the picture. I am thinking the dealer was Fowler Oliver Sales, as the decal said. Moline dealer nearby was Lecher of Boswell. They have some Whites also, 2-105's and 135's still.