An 84-year-old Mercedes-Benz that was left forgotten in a garage for more than 60 years could fetch as much as £1.6 million at auction in September.

The one-of-a-kind car, which was only recently discovered by the original owner’s grandson, still runs flawlessly and has never been restored. Last driven in the 1950s, the car will be up for auction at Bonhams’ Goodwood Revival sale in West Sussex,  on Sept. 15.