At its auction during the UK’s Goodwood Festival of Speed in July, Bonhams will offer a world-famous “Silver Arrow,” aka a 1954 Mercedes-Benz W196, being billed as the most important historic Grand Prix race car ever brought to auction.

While no one has yet put a firm number on it, speculation is hovering around the $40 million mark, meaning it could become the world’s most expensive car.

Bonhams Press Launch 18 March image 2 re-sized

The 1954 2½-litre straight-8 W196 einsitzer—chassis number ‘00006/54’—is the one in which five-time World Champion Driver Juan Manuel Fangio won both the 1954 German and Swiss Grand Prix races.

Chassis 00006 was also the first open-wheeled slipper-bodied postwar Mercedes-Benz ever to win a Formula 1 Grand Prix race, and marked the introduction of fuel-injected engines into Formula 1 racing.

Get it while it’s hot…