BACKHAUS, Wilhelm, letters, autographs, documents, manuscripts Home | Archive | Facsimiles | Forgeries | Back BACKHAUS, Wilhelm (1884-1969). Pianist. Signature ('Wilhelm Backhaus / 10.4.35.') in pencil on small white card, ca 50 x 90 mm (2 x 3½ inches). [No: 5260] This is the archived description of an item that has already been sold. Please contact me if you would like any further intormation.