This Spitfire HF Mk VII EN474 was tested by the USAAF .
This Spitfire HF Mk VII EN474 was is now housed at the Smithsonian National Air and Space Museum , the only surviving example of a Mk VII .
This Spitfire HF Mk VII EN474 was tested by the USAAF and is now housed at the Smithsonian National Air and Space Museum , the only surviving example of a Mk VII .