Four posters, 20 x 30, three by British artist Martin Sharp. In the same vein of graphic designers such as Michael English of Hapshash and the Coloured Coat, Martin Sharp was one of the artists responsible for creating the “poster as art” market during the psychedelic 60s when “happenings,” underground concerts, and other out-of -the-mainstream social events were promoted by posters with ornate, psychedelic imagery such as these, comprising two 1967 cannabis legalization rallies, Donovan Sunshine Superman, and a collaborative effort with Max Ernst. Highly collectible and rapidly disappearing from the marketplace. In very good condition, with scattered moderate creasing, surface marks, and edge tears. Rolled. RRAuction COA.