Black-and-white 8 x 10 inch portrait of the composer by Hungarian-born, American photographer Nickolas Muray (1892-1965). Inscribed in upper right corner, "To Mr Jean Bedetti. Many thanks for your excellent playing". Bedetti was the principal cellist in the Boston Symphony Orchestra during a concerto for Piano & Orchestra, 17 & 18 February 1928. Bartok played the piano, Serge Koussevitzky conducted the concert. Photographer's stamp on verso, a few small nicks and tears to margins, overall very good. Signed photographs of Bartok, especially large ones such as this, are uncommon.