It was the car that made Zagato's signature double-bubble roof famous. Estimated to be 600 made. Abarth boosted the original Fiat 600 22 bhp four cylinder engine to 47 bhp @ 6000 rpm. Top speed of 118mph. It was one of the most successful rally racing cars of the 50s & 60s. (wikipedia)
(Photos from sportscarshop.com & supercars.net)
(Photos from classicandperformancecar.com & carstyling.ru)