The widely circulated Turandot from Moscow (https://www.youtube.com/watch?v=WaiRcCYIQ3Q&t=17s&ab_channel=JoanSutherlandFan) is from a later date (8 Sept.? not sure); only excerpts survived from that performance.
This is from the opening night (5 Sept 1964) and the full performance survives.
Unedited sound https://www.youtube.com/watch?v=WiNVcepP5T0&ab_channel=EpidaurusII
Turandot by Giacomo Puccini performed in Italian
Conductor Gianandrea Gavazzeni - 1964(LI)
Orchestra - Teatro alla Scala
Chorus - Teatro alla Scala
La principessa Turandot - Birgit Nilsson
Calaf - Bruno Prevedi
Liù - Mirella Freni
Ping - Renato Capecchi
Pang - Franco Ricciardi
Pong - Piero de Palma
Timur - Nicola Zaccaria
L'imperatore Altoum - Walter Gullino
Un mandarino - Lorenzo Testi "
