Rare signed halftone photograph of the great Italian conductor who was considered Toscanini's successor before his tragic early death in a plane crash. Boldly signed and inscribed in blue ink along the side of the photograph, which has been taken from an English concert program, and dated 1955. Another hand has dated the page at the lower right: June 26, 1955 - shortly before he was named Musical Director of La Scala. Left edge rough; otherwise in very good condition. 7.25 x 9.75 inches (18.3 x 24.6 cm).