Title: Symphony, K. 19b (Mozart)
Content:  London Sketchbook (K. 15a–15ss), Fischer believed that the use of trumpets and timpani would be more likely for a C major symphony like K. 19b. Though the wrapper for K. 19 does not mention trumpets nor timpani, he notes that the set of parts was originally for an F-major symphony (K. 19a) and that Leopold may not have deemed it necessary to change the list of parts. The authenticity of this symphony is more credibly shown by the source attribution to Gatti in the Breitkopf & Härtel manuscript catalogue, making it plausible that it was among the six sent to Donaueschingen by Leopold Mozart in 1767.
Title: Symphony No. 19 (Mozart)
Content:  Symphony No. 19 in E-flat major, K. 132, is a symphony composed by Wolfgang Amadeus Mozart in July 1772.
Title: Symphony, K. 19b (Mozart)
Content:  out in his 1995 review of Zaslaw's book that the scores were parts rather than full scores, thus not constituting solid evidence for such a chronology. He also speculates that K. 19b may have been the symphony Maria Anna Mozart referred to when she remembered Wolfgang having "composed his first symphony with all the instruments of the orchestra, especially Trumpets and Kettledrums" when Leopold was dangerously ill. K. 16, though traditionally numbered as the first symphony, does not have this instrumentation: thus a lost work must be referred to. Though Zaslaw identified it with a possible E major symphony ("No. 0") possibly derived from pieces in 
Title: Symphony, K. 19b (Mozart)
Content:  of opening was much used by other composers as well in the period. Thus he opines that a stylistical analysis cannot credibly be performed until the work is rediscovered. Nevertheless, the wrapper used for the set of parts to enclose the K. 19 symphony in D had been used previously for a symphony in F (K. 19a) and then one in C (possibly K. 19b), as can be seen from the deletions and insertions on the title page, which suggested to Zaslaw that Mozart had written a C major symphony before K. 19 and that K. 19b should receive a lower Köchel number. Stephen Fischer however 
Title: Symphony, K. 19b (Mozart)
Content:  The lost Symphony in C major, K. Anh. 222/19b, was probably written by Wolfgang Amadeus Mozart in early 1765 in London. It is one of the twelve symphonies that Ludwig von Köchel only knew by its incipit in the Breitkopf & Härtel manuscript catalogue (p. 10, No. 68), which listed it as one of six symphonies (Nos. 65–70) sourced from Luigi Gatti (1740–1817), Court Kapellmeister in Salzburg from around 1782:  The instrumentation for the symphony is unknown, but Alfred Einstein speculated that it would have been the same as the contemporary known symphonies K. 16 and K. 19 (strings, 2 oboes, and 2 horns). In his third 
Title: Symphony, K. 19a (Mozart)
Content: 1) Allegro assai, ; 2) Andante, ; 3) Presto, The Symphony in F major, K. Anh. 223/19a, was probably written by Wolfgang Amadeus Mozart in early 1765 in London. The symphony is scored for two oboes, two horns and strings. In contemporary orchestras, it was also usual to include bassoons and harpsichord if they were available in the orchestra to reinforce the bass line and act as the continuo. The oboes are silent for the second movement. The duration is approximately 12–14 minutes.  The symphony consists of the following movements:  The symphony was lost until a copy in the hand of Leopold Mozart was found in 1980. The title page stated it to be composed 
Title: Symphony, K. 19a (Mozart)
Content:  Wolfgang was 9 years old, i.e. in 1765. However, since Leopold often advertised his son as being younger than his actual age, this date is questionable. Before the discovery, only incipits were known, from the archives of Breitkopf & Härtel and on the third page of the cover for the K. 19 symphony. (This cover had previously served as a cover for this symphony and a Symphony in C, K. 19b, still lost). The symphony had still not been found at the time of K6. The symphony is influenced by Johann Christian Bach. Harold Schonberg notes that the symphony "has no individuality" on account of Mozart's very young age at the time of its composition.
Title: Symphony No. 1 (Weber)
Content:  Carl Maria von Weber's Symphony No. 1 in C Op. 19, (J. 50) was written in 1806–1807. It was written for Duke Eugen of Württemberg, who employed Weber from 1806. It has four movements: 1. Allegro con fuoco 2. Andante 3. Scherzo. Presto 4. Finale. Presto
Title: Symphony No. 29 (Mozart)
Content:   The Symphony No. 29 in A major, K. 201/186a, was completed by Wolfgang Amadeus Mozart on 6 April 1774. It is, along with Symphony No. 25, one of his better known early symphonies. Stanley Sadie characterizes it as "a landmark ... personal in tone, indeed perhaps more individual in its combination of an intimate, chamber music style with a still fiery and impulsive manner."
Title: Symphony No. 2 (Szymanowski)
Content:  Karol Szymanowski completed his Symphony No. 2 in B flat major, Op. 19 in 1909 at the age of 27. Szymanowski was greatly influenced by German culture and the symphony has many echoes of Richard Strauss and Max Reger. This symphony introduced Szymanowski to Europe in 1911-12, following its Warsaw premiere on 7 April 1911 and it was heard in Berlin, Leipzig and Vienna. The symphony was published soon after the composer's death after much revision. This symphony and its use of a solo violin laid the foundation, so to speak, of Szymanowski's first Violin Concerto. A typical performance of the symphony lasts about 30 minutes.

Question: Who was the composer of Symphony, K. 19b?
Answer: Wolfgang Amadeus Mozart.
Mozart.
Joannes Chrysostomus Wolfgangus Theophilus Amadeus Mozart.
W. A. Mozart.
Johann Chrysostom Wolfgang Amadeus Mozart.
Joannes Chrysostomus Wolfgangus Amadeus Mozart.
Johannes Chrisostomus Wolfgangus Theophilus Mozart.
V. A. Mocartas.
Volphnkank Amedaios Motsart.
Apollo Mozzart.
Wolfgango Amadeo Mozart.
Mozhate.
Johann Chrysostomos Wolfgang Gottlieb Mozart.
Wolfgang Gottlieb Mozart.
Wolfgang Amadè Mozart.
Wolfgang Amadeus Chrysostom Mozart.