The Retromobile 2020 event is happening right now in Paris, France, with car fans coming together to celebrate the first major classic car show of the year. French auction house Artcurial is in charge of the official Retromobile auction, and has an eclectic catalogue of cars, tractors, motorcycles, and even boats up for sale. A large contingent of the cars on the auction list are recently discovered barn finds, or unrestored examples of rare models. We have profiled a selection of vehicles that are wearing their age and experience on show, ahead of the sale on Friday. Developed alongside the famous BMW 507 roadster, the 503 was intended to help the company’s sales in the United States. Like the 507, the 503 was prohibitively expensive when launched. Only 413 examples were sold, leaving BMW suffering substantial losses. Just 273 of those cars were coupe models like this one, powered by BMW’s 3.2-l V8 engine. Originally sold to a Belgian owner, the car was later bought by a doctor who suffered an accident whilst driving the 503 in 1976. The good doctor then traded the BMW in for a Jaguar, leaving the 503 to sit at a dealership until 2007 when it was bought by the current owner. T...