2.25" w/"Hip Prod., 633 North., Chgo" on curl at 6 o'clock.  Features cartoonist Bill Mauldin illustration of a flower growing on a tombstone w/barbed wire in the foreground. Text reads "Response Chicago Response November 2nd." Response was a Chicago multi-gallery art exhibit that was open to anyone's work that was deemed a valid response to the riots at the 1968 Democratic National Convention. Faint surface wear seen only in reflected light. NM displaying Mint. First we can recall offering.