[Berkeley]: [Political Poster Workshop at the University of California, Berkeley], . 17.75x21.75 inch poster silkscreened on the back of conjoined sheets of computer printout paper, as usual for the products of this workshop at Berkeley. Perforated sprocket edge strip intact. Very good. In the Maggs Bros book "4973: Berkeley Protest Posters 1970," this is a size variant of poster 10. The number 4973 at lower right is explained by Lincoln Cushing, quoting Robin Repp, one of the participating artists: "We put the number 4973 on the posters because it was a sort of 'stamp of approval' number from the Berkeley Police Department. We were led to believe that if we put the number on a poster, it would not be torn down from city poles or signs."
Participants in the Political Poster Workshop practiced the techniques of silkscreened poster production on sheets of used computer printout paper. Most of the products of this workshop are very scarce, for obvious reasons.