Fitelberg, Gregor. (1879 – 1953). Autograph Musical Quotation Signed. Rare AMQS from the Latvian born Polish conductor/composer/violinist, who led the Warsaw Philharmonic for many years and who also conducted for Diaghilev, premiering Stravinsky’s Mavra among other works.  A champion of new Polish music, he conducted the first performances of most of the works of Szymanowski and Karlowicz among many others. Very scarce.  Vertical fold crease and light wear; overall fine.  7.15 x 4.75 inches (18.1 x 12 cm.).