Explicit Altered "Ford" logo silkscreen protest poster

30.75 x 11.5 inches. Single color screenprint, entirely unmarked. Purchased from a Pittsburgh estate that had many collectible posters from the San Francisco Haight-Ashbury scene of the '60s and '70s. Presumably made by a graphic artist in connection with the 1967 Ford strike, but entirely without attributiion. There are staple holes in the four corners and some bands of sunning that attest to its time on a wall somewhere. A vertical crease on the left side, minor bumping, overall very gently used. Unbacked; will ship rolled.