A young Wolfgang Amadeus Mozart (1756-1791) composed SYMPHONY No. 9 in C Major, K. 73, at some point between 1769 and 1772. It was likely started in Salzburg by the 12-year-old some time after his second Italian tour, but both the completion date and premiere is unknown. Instrumentation: 2.2.0.0: 2.2.0.0: Timp: Str (4-4-3-3-3 in set).