These orchestra members are represented by the ICSOM, the International Conference of Symphony and Opera Musicians. Their Web site publishes the annual salaries contracted for these musicians. See below.
About $250.00 for a 2.5 hour single performance. That's roughly $100 per hour (union scale for New York). For rehearsals only, about $125 (2.5 hour minimum call).
From age 26 to 30 he was Concertmaster of the Metropolitan Opera Orchestra, also traveling annually on concert tours of Europe. The link below will be of interest to you.
I think you are referring to Marian Anderson. However there is conflict over her actual birth date covering a span of 6 years. All things considered she fits your question.
James Levine leads the Met Opera orchestra -- said by some conductors to be the "Lamborghini" of opera orchestras. The names of the individual musicians is not generally available as a list. Read...