This is a downloadable zip file with posters from the 1950s through the 1970s and beyond, a virtual history of Rock and Roll! These are hi res images in jpg format. The main zip fil contains 3 zip files:
Rock & Roll Advertising Posters 1954-1975 - 1380 files
Rock Advertising Posters 1966-1971 i- 69 files
Rock Concert Posters 1966 - 1975 313 files
Examples of the posters are shown here!