Opera Singers - Lot of 37 Playbills

Lot of 37 playbills announcing concerts by famous opera singers including Pavarotti, Verrett, Valletti, Tagliavini, Peerce, Caballé, Siepi, Tebaldi, Corelli, Vickers, Milnes, Di Stefano, Gedda, Sutherland, De los Angeles, Leontyne Price, Scotto, Sills, Schwarzkopf, Nilsson, London, Talvela and others  All playbills are one sheet printed on both sides, various sizes ranging from 5.5 x 8.25 to 7 x 10.5 inches, all in excellent condition.