July 19-24. Amateur participants: 11 groups from Germany, Czechoslovakia, Denmark, Spain, France, Hungary, England, Sweden, and Switzerland. Professional Participants: Tete Montoli, Eric Peters, Peer Wyboris, Ella Fitzgerald, Oscar Peterson, Dizzy Gillespie, Alexander Gafa, Earl C. May, Granville W. Rocker, Guy Lafitte, Andre "Pepe" Persiany, Rolland Lobligeois, Paraboschi, Oliver Jackson, Illinois Jacquet, John Hardee, Gene "Mighty flea" Connors, George Duvivier, Johnny Guarniery, "The Barrelhouse Jazzband & Angi Domdey", "The Barrelhouse Jazzband & Angi Domdey", "Trevor Richards New Orleans Trio", "Duo Gladkowski-Zgraja", Joe "Mighty" Young, Reverend Cleophus Robinson and Trio, Marion Williams, Dorothy Donegan, Jacky Byard, Ray Briant, Jo Jones, Harry "Sweet" Edison, Earl Warren, Teddy Wilson, Major Holley and Panama Francis. Winners: It had no competitive nature.