Wolfgang Amadeus Mozart began his series of preserved piano concertos with four that he wrote in Salzburg at the age of 11 : K. 37 and 39–41.

The autographs, all held by the Jagiellonian Library, Kraków, are dated by his father as having been completed in April (K. 37) and July (K. 39–41) of 1767.

This is perhaps supported by two facts: First, Leopold excluded the first four concertos from his 1768 list, suggesting that he may not have considered them true compositions by his son.

[1] The concerto is scored for two oboes (silent in the second movement), two horns in F, piano (or harpsichord) and strings.

The provenance of the second movement is unknown, although Eric Blom, the editor of the 5th edition of Grove's Dictionary (1954), suggested that it was in fact by Mozart.

[2] The concerto is scored for pairs of oboes and horns (in B-flat), piano (or harpsichord), and strings.

[2] The concerto is scored for pairs of oboes, horns and trumpets (both in D), piano (or harpsichord), and strings.

The preludes that Mozart added to the sonatas do not contain a wealth of themes, as is typical for his later efforts, nor does the exposition or middle section add new thematic material.

Nevertheless, some traces of his later structures can be detected: for example, the relative sizes of the sections is approximately similar, albeit on a smaller scale.