Great lot of 19 unsigned photo postcards of opera singers shown in role, including Gianni Raimondi, Mariella Adani, Peter Glossop, Birgit Nilsson, Franco Corelli, and others, at Teatro La Scala, Milan, from 1950s and 1960s; some photos are stamped on verso by the Theater.  Each one's size is 4.1 x 5.75 inches, all in very good and excellent condition.