Not long later, in 1941, Chrysler Corporation in cooperation with Briggs, the body manufacturing firm, announced its Newport and Thunderbolt show cars. Aside from its integrated fender line, the Newport did little to predict future styling features. The Thunderbolt, styled by Alex Tremulis, was a different story. It incorporated "futuristic" details that were in the styling air at the time it was conceived. Nevertheless, it was not an explicit effort to preview anticipated Chrysler design features. So a show car it was.
Five Thunderbolts were built, and four are said to exist. One was auctioned a few years ago by Southeby's RM Auctions. Their web site has this detailed background information on Thunderbolts in general and the car being auctioned in particular. An additional source that is well illustrated can be found here.