KING MOB. King Mob 2 1/2. n.p. [London, United Kingdom]: King Mob, n.d. [ca. 1969]. 1 p.; ill.; 57 x 76 cm.; black and red ink on white stock
Perhaps the most famous of the King Mob posters. Text reads: “If You Don’t Believe In Lead You’re Already Dead” : Reich, Geronimo, Dada: American Revolutionaries With A Message for England. : Up Against The Wall Motherfucker. : “Your Civilization Represents Death. You Eat Dead Food. You Live Dead Lives. You Dig Dead Art. You Fuck Dead Women.” ; “We’re Looking For People Who Like To Draw.” ; King Mob No 2 1/2.”
We locate copies at Cornell and the New York Public Library, though the Tate also appears to own a copy (see here for the exhibition in which it was displayed, along with other posters from the Camden Poster Workshop)
Situationniste Blog 
The central figure in this poster is “Trashman” by US comix artist Spain Rodriguez