[Fluxus] Original posters for the Tenth and Fifteenth Annual New York Avant Garde Festival (1) Tenth Annual New York Avant Garde Festival, December 9, 1973. Designed by Jim McWilliams, 87.5 x 50.5 cm, colour printed single side, folded once. The experimental festival was founded by cellist and performance artist Charlotte Moorman, and ran from 1963 to 1980. This 1973 issue was staged on train cars at Grand Central Station. Participants included John Cage, Yoko Ono, Ay-O, George Brecht, Alan Kaprow, Antoni Muntadas, Ben Vautier and many others. Slight bumping on extremities, overall a fresh copy. (2) Fifteenth Annual New York Avant Garde Festival, July 20 1980. Double-sided colour poster, 88.5 x 58.5 cm, folded three times for mailing. The event was held at Passenger Ship Terminal, 55th Street & Hudson River, New York City. Artists included Ay-O, Barbara Ess, Simone Forti, John Giorno, Dick Higgins, Joe Jones, Alison Knowles, Les Levine, Nam June Paik, Michael Smith et al. Moderate handling wear to exterior of mailed copy, else in good condition. (total 2)