Interesting old machines, my friend has recently been given a old Case combine. A self propelled 600 or 660. Very rare over here in the UK. It appears case combines didn't become popular here until they merged with international and the Case International 1660 Axle flow was on the Market. I remember being impressed with the speed of those Axle flow combines when i was a child. That was a time when rotary threshing was relatively un explored and people were still cautious about moving away from the tried and tested straw walkers.