Check this out... a British film enthusiast took some video footage of the 1955 Monaco Grand Prix, and the film lay forgotten for years. It's only just been rediscovered... a real treat to watch.
http://news.bbc.co.uk/local/leicester/hi/people_and_places/history/newsid_9146000/9146538.stm
http://news.bbc.co.uk/local/leicester/hi/people_and_places/history/newsid_9146000/9146538.stm