But they could also be inspired by the look of a Jeep Willys. Shark teeth aren't specific to the American P-51 Mustang, though the airplane did wear them well. The British version of the Mustang ...

These pilots flew P-40 fighter planes and ... when it was featured on the F-51D Mustang. The Vietnam War even included several examples of the shark mouth displayed on aircraft like the F-4E ...