Duesenberg became one of the most popular in America, owned by the rich and famous, among them Clark Gable, Gary Cooper (Each owning one of the two very rare SSJ 125″ short-wheelbase convertibles) and the Duke of Windsor. Duesenberg advertising claimed that it was the best car in the world, and their world-beating performance and extreme opulence tend to back that up. There was a gradual evolution up to the 1937 model, that preserved the “stately lines” while moving into a more integrated mode of styling. The final evolution of the Duesenberg engine were ram-air intakes added to some of the last supercharged models to produce 400 horsepower and are referred to as ‘SSJ’ (also a name never used by the factory). Of the 481 Model Js and SJs produced between 1928 and 1937, 384 are still extant, 4 of them now owned by Jay Leno. Duesenberg ceased
Model X Duesenbergs are very rare. According to Randy Ema, the country’s top Duesenberg authority, only 13 Model X’s were built. They fit in between the Duesenberg Model A and the famous Models J and SJ, which were built from 1929 to 1937. Only four known X’s survive.
On July 30, 1923, Duse became the first woman (and Italian) to be featured on the cover of the nascent Timemagazine
http://wikicars.org/en/Duesenbergproduction in 1937 after Cord’s financial empire collapsed.