The picture from the rear that Barry posted tells more. There is a 56 Oldsmobile next to the overturned Mercury being picked up by a wrecker. Back at the Mark II there is a policeman or fireman with a clipboard standing next to the 55 Ford, which does appear to have clipped the Mark II.
I have updated the history:
This car is now owned by Forum Member Roger Matherly. Roger bought the car at the Mercum "57 Heaven" auction in Branson, Missouri.