Thanks for the response Mike. Maybe my first comment wasn’t clear enough . The disk was released in 1961 in the USA, that is correct.
However, the conductor Vassily Tselikovsky was only alive until 1958 -" Василий Васильевич Целиковский (30 января (11) февраля 1900 год, Астрахань — 5 февраля 1958, Москва)".
It seems that Lyudmila Legostaeva did not record anything after 1954 (according to the catalog data in records.su). She was a soloist of the ensemble until 1960.
Unless the information about the conductor is not correct, it would seem that the recording is at least older than 1958? Perhaps one of the state archives would have more information about the original recording year?