Here is a nice Metropolitan Opera program cast sheet from a performance of Verdi's Don Carlo, signed by four of the principal singers, Nell Rankin, Giorgio Tozzi, John Macurdy, and Elinor Ross. Rankin sang the role of Princess Eboli. The originally scheduled Eboli, Grace Bumbry, sang the first two acts of the opera, then Rankin took over for her mid-performance. Franco Corelli, Robert Merrill, Paul Plishka, and Frederica von Stade were also in the cast. The program sheet is dated June 21, 1972. It is in great condition, with very slight discoloration. There are no tears or creases. It is approximately 8 x 11 in.