July 22-25. Amateur participants: 14 groups from Austria, Czechoslovakia, Spain, France, Hungary, Poland, Romania, Sweden and Switzerland. Professional participants: The Aces, Fred Below, Jo Jones, Sammy Price, Slam Stewart, Big Joe Turner, Candy Johnson, Stephan Grappely and Joe Turner. Winners: 1. The Swinghouse Septet (Switzerland), Traditional. 1. Nykodemus (Austria), Modern. Popularity: The Jazz Fiddlers (Czechoslovakia). Best soloist: Marek Michalak, trombone, Old Metropolitan Band (Poland).