Wolfgang Amadeus Mozart's first four sonatas for keyboard and violin, K. 6–9 are among his earliest works, composed between 1762 and 1764.
Schobert, in fact, had already published a number of keyboard sonatas with violin accompaniment, which possibly served as models for the young Mozart.
The work was published during the Mozart family's grand tour of Europe in Paris in January 1764.
Along with the K. 6 sonata, Mozart's father Leopold published them as Wolfgang's Opus 1 and had them dedicated to Princess Victoire of France.
[1] The sonata is in of D major and is set in three movements: Composed in late 1763 and published in 1764 in Paris as Op.