Picture 1: Pb Brazil special edition As Melhores Fotos Eróticas de Pb - year 1981
All centerfolds published by Pb are cropped except this picture. I think this is an integral copy of the 8x10 film used by Pb photographers (the proportions are equal).
Picture 2: Pb USA special edition Facts and Figures - year 1997
Picture 3: Pb USA special edition The Girls Of Pb 3 - year 1978