Earl “Madman” Muntz built the Muntz Jet, a well-known Californian used car dealer and electronics retailer. With the help of famous Frank Curtis, he produced 400 Muntz Jets, one of the first American sports cars.
All cars were convertibles and featured numerous unique features along with the choice of Cadillac or Lincoln V8 engines. Unfortunately, the market just wasn’t ready for an expensive and limited production American sports car, so the Muntz Jet was discontinued in a couple of years. Out of around 400 cars built, there are only about 45 left today (via Silodrome).