its a painting by Harrison Fisher that he made back in World War 1 for the Red Cross. I don't think this one has a model because most of the ones he did not have one but he did use models sometimes, If I were to guess I would say the model in this one is Dorothy Gibson. He pretty much imagined how an American woman should look and went from there I think.
I knew you were gonna say the P-51. Nice plane. but the british spitfire would have torn it a new one. specially the MK.XIV model with 20mm cannons and shit. If both planes were stripped down they would probably handle almost identically except the spitfire has a more powerful engine.