Britain's Queen Charlotte commissioned them on 25 October, and the works were dedicated to her on 18 January 1765.
Unlike Mozart's other works for violin and keyboard, the first edition was printed with a separate ad libitum cello part for all six sonatas.
2, WB 43–48) by Queen Charlotte's music teacher Johann Christian Bach.
[1] Bach befriended the young Mozart, and became an important influence on the younger composer's evolving style.
The Neue Mozart-Ausgabe therefore includes the works with the piano trios, unlike the earlier Alte Mozart-Ausgabe and the various editions of the Köchel catalogue which list them as violin sonatas (or flute sonatas).