This record is a very important muscial document, It features sound contributions by Pierre Henry, spoken word performances by popular French actors Michel Vitold and Silvia Montfort basing on two texts by fellow actor and singer Claude Pascal. It can be rather seen as an audio book than a regular music record backed with sounds. Pressed at 333 numbered copies from 1 to 333, there was also 26 copies marked from A to Z reserved to the authors. This edition constitutes the only and definitive, the matrix being destroyed publically a La Hune Paris, 170 Boulevard St.Germain, on 17 April 1958. Recorded in the Studios du Groupe de Recherches de musique concrète de la R.T.F. in Paris, it includes 2 exclusives texts by Claude Pascal. Seriously look after by concrete/ comtemporary collectors due to 1st discographic apparence of Pierre henry, as side A uses extracts of Pierre Henry's Concerto des ambiguïtes. This copy has a the X letter on label. Ask me for more details. Serious offers only, this record should to a museum !