the data I have comes from one of the top men in the CASE design team so I will say it is right, they only made the 1665 a very short time production started in 69 and ended in 1970 no combines were made after 1970 they had new inventory left in stock until at least 72 as we had a man looking for a 1660 in 1972 we found a handful but they were at least 300 miles away so we dropped that idea, I can still remember the day we were told that Case was dropping everything to become the "Tractor Specialist's" that was in Jan 1970 they had a "fire sale" for all items that were discontinued that included combines