An historic Formula 1 car driven by world champions Michael Schumacher and Nelson Piquet is set to go under the hammer.
The 1991 3.5-litre Benetton-Cosworth Ford B191 was driven to victory by Piquet at the 1991 Canadian Grand Prix, and was also raced by subsequent seven-time world champion Schumacher during that season's Japanese and Australian GPs.
The 1991 Canadian GP was three-time F1 world champion Piquet's final win in the sport. After starting the race in eighth position, Piquet managed to claim victory after rival Nigel Mansell stalled on the final lap.
The famous F1 car, which bears the chassis number B-191-02, will be auctioned at the Bonhams Spa Classic Sale – which is held at the same circuit that Schumacher made his F1 debut – and is expected to fetch between £640,000 and £810,000.
It is powered by a naturally-aspirated 3.5-litre Cosworth Ford V8 engine that can develop as much as 650bhp at 13,000rpm and weighs just 650kg.
After it was retired from F1, the car was rebuilt and put on display as a museum exhibit before it was completely restored and brought back to running order a number of years later.
The Bonhams Spa Classic Sale will be held at Le Circuit de Spa Francorchamps in Belgium on May 21.