1/72 Plastic North American P-51D Mustang Airplane from Tamiya's War Bird Collection Series. Ages 10 and over. In April 1940, drawings were sketched in a New York City hotel room for a new fighter aircraft for the British Purchasing Commission. This fighter, the North American NA73X, became one of the best fighter aircraft in the U.S. Army Airforce during World War II, and is known as the P-51 Mustang. Of the several variations of this famous fighter, the P-51D is generally accepted as the definitive Mustang and was the first production version with the "bubble" canopy. More "D" model Mustangs were built than all other Mustang variants combined, with a total of 9,603 coming off production lines.