Built in Germany from 1950 to 1957 with an aluminum body, fewer than 100 of these very rare cars exist. The 347-pound Kleinschnittger is powered by a 5-hp two-stroke engine fitted to a three-speed transmission with a top speed of 43 mph. Unlike many micro cars of the day that looked like bubbles or children’s toys, the Kleinschnittger resembles a full-size car but on a smaller scale.