Violin Concerto no. 1 in B flat major, K.207

Wolfgang Amadeus Mozart's Violin Concerto No. 1 in B♭ major, K. 207, once was supposed to have been composed in 1775 (when Mozart was 19), along with his other four violin concertos. However, analysis of handwriting and the manuscript paper on which the concerto was written suggest that the date of composition might have been 1773, specifically with a completion date of April 1773. If this date is correct, the concerto is likely to be Mozart's first original concerto. It exhibits the usual fast–slow–fast structure that was predominant for solo concertos of the late eighteenth century.