Orchestra of America Note that Leon Barzin and the National Orchestral Association gave the premiere of a cello concerto by George Kleinsinger on 1/9/1950. The notes for this program suggest that Kleinsinger destroyed that concerto (different movement designations than this one) and began work on a new concerto in 1951, completing it in 1963. WORLD PREMIERE of George Kleinsinger's CELLO CONCERTO WORLD PREMIERE of Josef Alexander's SYMPHONY NO. 2 NEW YORK PREMIERE of Irving Fine's DIVERSIONS FOR ORCHESTRA symphony orchestra performance 1965-01-17T20:30:00