Original glossy promotional photograph of the important 20th-century composer and conductor, signed and inscribed by Boulez with an amusingly minimal autograph musical quotation of a whole note A, labeled "440 Hz." Boulez is shown photographed by Marion Kalter for Deutsche Grammophon, and has inscribed the photo at the foot to photographer Hermann Landvogt and dated June 19, 1994. A crisp signature and inscription; in very fine condition. 7 x 9.5 inches (17.8 x 24 cm).