That's an International TC5 Skidder tractor. They were made in the mid-sixties and sold to loggers. Came in gas or diesel models. Supposedly they didn't tear the ground up as much as regular crawlers and were to have more traction, but my experience with them was they tore the woods up just fine. The tracks had to be kept real tight or the rubber drive wheel in back would spin inside the track, especially if the ground underfoot was wet. The drive tire was ribbed, the others were smooth. These were all direct drive machines with one reverse gear and I believe, four forward gears. They were supposed to be very good in northern forests where a lot of logging was within swamps or other low spongy ground.
I did some logging with a couple and demonstrated some for a dealer I was working for, but they never sold very well and IH discontinued them pretty quickly. I plowed a lot of snow one winter with one too. It did real well at that. They turned hard as hell as they had a lot of track on the ground compared to regular crawlers.
I didn't know they sold them down under.
