4435: German built combine for Deere by Claas, I think. Previous model was a 4425. They are primarily a 4 row wide corn capacity, smaller than a 6620, or 1660. Hard to get parts for. In my opinion not a very good venture on Deere's part. It was brought in to replace the U.S. built 4420 and 4400 which were 4 row machines. A neighbor of mine has one and is waiting on parts from Germany to arrive. Meanwhile, he is hiring is combining done. Hope this helps