CALLAS MARIA: (1923-1977) American-born Greek Opera Singer. An excellent vintage signed and inscribed 4 x 6 postcard photograph of Callas standing in a full length pose in costume from the title role of Donizetti's opera Anna Bolena. Photograph by Piccagliani for Teatro Alla Scala. Signed ('Maria Meneghini Callas') in blue fountain pen ink to the image, partially across a darker area although perfectly legible. One very minor corner crease to the upper right white border, otherwise VG. £300-400