Some years ago, I obtained a 25 LP boxed set, released in 1978, to commemorate Stockhausen's 50th birthday.
I have not been able to find any information about it, apart from a listing of this item on the worldcat database, which describes the set in the following manner:
"In gratitude to the composer and as a gift on the occasion of his 50th birthday on August 22, 1978, Polydor International has comprised the greater part of the recordings of these years of collaboration with Karlheinz Stockhausen into a limited special edition."
Program notes in German, English, and French on or bound in individual containers; leaflet ([4] p.), signed by composer, laid in.
Performer(s): Performed by various artists and ensembles.o
Description: 26 audio discs 33 1/3 rpm, stereo 12 in.
Contents: Alphabet für Liège. "Am Himmel wandre ich ..." (Indianerlieder)--Harlekin.--Der kleine Harlekin.--Chöre für Doris.--Choral.--"Atmen gibt das Leben ..."--Punkte.--Sternklang.--Drei Lieder.--Sonatine.--Spiel.--Schlagtrio.--Mikrophonie I.--Mikrophonie II.--Gruppen.--Carré.--Telemusik.--Mixtur.--Trans (First performance)--Trans (Studio recording)--Stop (London version 1973)--Ylem (First London version 1973)--Kreuzspiel.--Kontra-Punkte.--Zeitmasze.--Adieu.--Gesang der Jünglinge.--Kontakte (1. Teil)--Kontakte (2. Teil)--Mantra.--Kurzwellen.--Musik im Bauch.--Tierkreis.--Aus den sieben Tagen. Kommunion.--Aus den sieben Tagen. Intensität.--Stimmung.--Aus den sieben Tagen. Es.--Aus den sieben Tagen. Aufwärts.-Prozession (1971)--Hymnen.--Momente (Europa Version 1972)--Momente (Donaueschinger Version 1965).
Do any forum members know about this particular collection? I have not seen it listed in any online Stockhausen discographies