Mengelberg, Willem. (1871-1951) Autograph SignatureAn autograph signature of the important conductor, friend and advocate of Mahler, Strauss, Schoenberg and Reger. He has signed on a small slip, underlined boldly, and dated London, November 4, 1936. Mounting remnants on the verso and some toning; overall in very good condition. 4. 5 x 2. 75 inches (11. 3 x 7. 1 cm). Together with a later photograph postcard with one perforated edge, 3. 5 x 5. 5 inches (9 x 13. 8 cm).