Mengelberg, Willem. (1871-1951) Signed PhotographExcellent signed portrait of the important conductor, friend and advocate of Mahler, Strauss, Schoenberg and Reger. 8 X 10 inches, showing Mengelberg in a close up portrait, inscribed at the top margin in German to Mr. Zylstra, adding the date of July 1, 1936. Inscription in darker portion, but signature is very good. Simply framed in wood, a slight crease at left margin.