Argentine, Spanish, Belgian, French, Brazilian, German, and British manufacturers obtained licenses to produce the Isetta microcar, originally designed in Italy. The car earned the nickname “bubble automobile” due to its egg-shaped design and bubble-like windows. In 1955, the BMW Isetta became the first mass-produced car to achieve a fuel consumption of 3 L/100 km (94 mpg‑imp; 78 mpg‑US), selling 161,728 units and becoming the best-selling single-cylinder car in history. The Italian company Iso SpA was the original manufacturer, with the name Isetta derived from the diminutive form of Iso, meaning “little Iso” in Italian.

h/t: vintag.es