One of the most controversial products of styling was the Comfortractor. The Model U was the first tractor to have an enclosed, heated cab. It was also no slow-poke, with a road gear capable of a blistering 40mph. But it also had three seats, so come Sunday morning, Farmer Bob could simply hose off the field dirt and drive the family to church in style! The Striking 1938 U-DLX was not an unqualified success. Mechanically, it was a reliable tractor. But farmers, accustomed to modesty and humility, looked on it as excessive. In the end, barely 125 were sold. It would be years before any other manufacturers would introduce fully-enclosed, heated cabs.

(from: The Illustrated History of the American Farm Tractor - Randy Leffingwell / Louis and B. Hold Publishers)