Page from True magazine featuring an illustration of a Petty Girl followed by a reproduction print of a painting of the Chigaco Cubs winning a baseball game. Pin-ups by artist George Petty or "Petty Girls" first made their appearance in 1933 and into the 1950s set the standard for American female beauty. The hallmarks of Petty pin-ups are elongated limbs most noted in the legs, a flirtatious smile, and telephones.