The String Quintet No. 1 in B flat major, K. 174, was written by Wolfgang Amadeus Mozart in December 1773. Unlike Mozart's other viola quintets which are scored for two violins, two violas and cello- this early work is scored for two violins, two violas and basso.
Mozart composed this quintet a few months following the composition of the Viennese Quartets, K. 168-173 – indeed this work immediately follows that set in the first edition of the Köchel catalogue.
Movements
The work is in standard four movement form:
4 in B-flat major, with trio in F major
4 in B-flat major
References
String Quintet No. 1 (Mozart) Wikipedia(Text) CC BY-SA