Mercedes-Benz built the W196 for the 1954 and 1955 F1 seasons, and this particular chassis was the one Fangio used to win the 1954 German and Swiss Grands Prix on his way to the championship.
It represents one of the most successful early F1 designs ever raced.
Bonhams sold it in 2013 for $29.6 million, a record for any F1 car that has stood for over a decade.
It has held despite the sport's modern cars generating vastly more attention and money than they did in the 1950s.
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