Its first post-Perón conductor, former Colón Opera House Director Juan José Castro, had returned from exile and took the baton to acclaim on November 11, leading the symphony in their performance of La Mer, by Claude Debussy.
Ongoing administrative disputes, however, took their toll, and the appointment of Teodoro Fuchs in March 1966 as its first full director since Castro met one the body's chief demands, though budget scarcities led to his resignation later that year.
Losing numerous musicians, Zorzi resigned, and though the 1970 appointment of Spanish conductor Jacques Bodmer as director was followed by a sponsorship from the Italian Embassy, lack of federal support kept the symphony on the brink of closure throughout 1971 and 1972.
A successful Beethoven series at the Luna Park Arena was followed by the 25th anniversary concert, November 29, 1974, memorable for its being held atop the Buenos Aires Sheraton with a televised reprise of Roberto Kinsky's inaugural program.
The appointment of Pedro Ignacio Calderón as chief conductor in 1996 was followed by a number of critics' awards and by the symphony's 50th anniversary celebrations in 1998, for which the body was invited to perform in Los Angeles and Tokyo.
[5] Obtaining their first salary increase in thirteen years in 2006, the National Symphony Orchestra has persisted over often overwhelming odds, not the least of which has been its lack of a permanent home (unofficially located in the Cervantes Theatre).
Maintaining a loyal esprit de corps among its musicians, who have on numerous past occasions performed without pay, the symphony has also attracted figures of international stature on the classical music stage, including guest conductors Erich Kleiber, Sir Georg Solti, Ernest Ansermet, Igor Markevitch, Hermann Scherchen, Sergiu Celibidache, Rudolf Kempe, Antal Dorati, Sir Malcolm Sargent, Hans Rosbaud, Jean Fournet, Igor Stravinsky, Heitor Villa-Lobos, Aram Katchaturian, Frank Martin and Pablo Casals, as well as renowned guest soloists such as Arthur Rubinstein, Ruggiero Ricci, Nicanor Zabaleta, Gyorgy Sandor, Martha Argerich, Uto Ughi, and Barry Douglas.