Symphony, K. 75 (Mozart) works from this time period, such as the K. 97 symphony, the autograph, which was in the possession of Breitkopf & Härtel, was destroyed during World War II. Mozart's authorship therefore remains uncertain. Most professionals consider the work authentic. The Alte Mozart-Ausgabe (published 1879–82) gives the numbering sequence 1–41 for the 41 numbered symphonies. The unnumbered symphonies (some, including K. 75, published in supplements to the Alte-Mozart Ausgabe until 1910) are sometimes given numbers in the range 42 to 56, even though they were written earlier than Mozart's Symphony No. 41 (written in 1788). The symphony K. 75 is given
Term Catalogue omitting many; and refusing all under 1sh[illing] [in] Price; hath occasioned the Printing of this Catalogue: wherein those defects are rectified. Collected by, and printed for, the Booksellers of "London". A comparison of the numbers of titles listed in the late 17th and early 18th century term catalogues and numbers the English Short Title Catalogue provides justification for these complaints. The 161 catalogues printed between 1668 and 1711 show an increase in the number of titles. The average catalogue listed 109 books under 10 headings. Some catalogues had up to 13 headings; the minimum was six in the small catalogue