At the heart of the collection are the five operas he conducted at Teatro Colón in 1958:
   Carmen with Jean Madeira and Pier Miranda Ferraro
   Fidelio with Gre Brouwenstijn and Hans Hopf
   Otello with Ramón Vinay, Antonietta Stella and Giuseppe Taddei
   Samson et Dalila with Blanche Thebom and Ramón Vinay
   Die Zauberflöte with Pilar Lorengar, Rita Streich, Anton Dermota and Arnold van Mill

The other complete opera recordings cover an even wider range of styles:
   Aida: 1939 with Caniglia, Stignani, Gigli and Borgioli
   Ariadne auf Naxos: 1950 with Zadek, Hollweg and Anders
   The Bartered Bride: 1939 with Konetzni and Tauber
   Les deux journées (Cherubini): 1947 with Micheau
   Elektra: 1947 with Schlüter
   Faust: 1929 with Nash, Licette and Easton
   Le jolie fille de Parth: 1949 with Catley, Dyer and Richard Lewis
   Tristan und Isolde: 1937 with Flagstad and Melchior
   Les Troyens: 1947 (broadcast) with Giraudeau and Ferrer
   A Village Romeo and Juliet: 1948 (broadcast) with Terry and Soames

Complementing the complete sets are abridged and excerpted operas:
   La Bohème (Act IV): 1935 with Perli and Nash
   Tales of Hoffmann (abridged): 1951 with Schock and Metternich
   Die Meistersinger von Nürnberg (excerpts): 1936 with Lemnitz, Ralf and Bockelmann
   Die Meistersinger von Nürnberg (excerpts): 1951 with Grümmer, Hotter and Anders

Sir Thomas's interests extended far beyond opera, so we have included both oratorio and orchestral selections:
   Messiah: 1947 with Suddaby, Thomas, Nash and Antony
   Mozart Symphonies 31, 40, 41: 1937
   Sibelius Symphony 2: 1954
   Delius Concerto for Piano and Orchestra: 1946 with Betty Humby Beecham