A remarkable piece of motoring history, this 1929 Alfa Romeo 6C 1750 Super Sport Spider is one of just four factory test cars created for the legendary 1929 Mille Miglia. Revered as one of the most iconic sports cars of the interwar era, this example exemplifies Alfa Romeo’s pioneering engineering and design. In 1936, it was factory-upgraded with a potent 6C 2300 “Pescara” engine, enhancing its performance and cementing its status as a highly desirable collector’s car. Finished in an elegant black-on-black color scheme, it has been in the care of its current owner since 2004. Expertly maintained over the years, the car received a professional engine rebuild in 2020 and has been regularly serviced to ensure peak performance. A proven participant in multiple Mille Miglia Storica events, it embodies both competitive spirit and timeless elegance. Offered with a Luxembourg registration document, this extraordinary Alfa Romeo is ready to be enjoyed on the road or displayed at prestigious ga...