July 21-25. Amateur participants: 12 groups from Germany, Czechoslovakia, Denmark, Spain, France, Poland, and Switzerland. Professional Contestants: Muddy Waters Blues Band (Pinetop Perkins, Willie Smith, Bob Margolin, Luther Johnson, Calvin Jones and Jerry Portnoy), Lloyd Glenn and Clarence "Gatemouth" Brown, Cab Calloway and Orchestra (Dic Vance, Doc Cheatham, Budd Johnson, Buddy Tate, Eddie Barefield, Hank Jones, Bill Pemberton, Oliver Jackson, J. Slide and three dancers), Carrie Smith, Grupo Nucleus (Ian Carr, Brian Smith, Geoff Castle, Bill Kristian and Roger Sellers), Wallace Davenport, Olivia Cook, Orjan Kjellin, Frederik Lonzo, Frank , Freddie Kohlman, Grupo Dolores (Pedro Ruy Blas, Jean Luc Vallet, Jorge Pardo, Alvaro Yeberes, Alvaro "Chever" and Cesar Berti), Charles Mingus and Quartet Ricky Ford, Dannie Richmond, Jack Walrath, Robert Neloms. Winners: 1. La Locomotora Negra (Spain), Traditional. 1. Crash (Poland), Modern. Popularity: Katamaran (Germany).