The villain's black car was named the "Hannibal Twin-8"; five were constructed. One of them is on display at the Petersen Automobile Museum, powered by a Volkswagen industrial engine. Another is at the Volo Auto Museum in Volo, Illinois. This model includes a prop "cannon" and a working smoke generator.
The Volo museum describes the Hannibal Twin-8 as built by Warner Brothers at a cost of US$150,000, powered by a Corvair six-cylinder engine with three-speed manual transmission and six wheels. All four rear wheels are powered by a chain drive.
Both vehicles were first on display at Movie World's "Cars of the Stars" museum in Buena Park, California, until the museum closed in the late 1970s.