Opera Singers - Lot of 48 Unsigned Photographs

Lot of 48 beautiful black-and-white photographs of different opera singers including Grace Moore, Montserrat Caballé, Shirley Verrett, Franco Corelli, Joan Sutherland, Renata Scotto, Luciano Pavarotti, Nicola Rossi-Lemeni, Maria Callas, Beniamino Gigli, Jan Peerce, Magda Olivero, Nan Merriman, and others, most of them in role, and some of them are signed by the photographer on verso.  Most of them are 6 x 9 inches and 8 x 10 inches in size, except Grace Moore's which is 11 x 8.8 inches, in excellent condition.