Scored for 2 Oboes, 2 Horns and Strings.
The Symphony In B-flat Major, sometimes called "Symphony No. 55", K. Anh. 214 (45b), was probably written by Mozart in early 1768 in Salzburg.
The work was included in the Breitkopf catalogue as an incipit so was placed in the Appendix by Köochel in his catalogue of Mozart's works as K.Anh.214. Later on a set of parts was discovered in the Berlin State Library which suggested composition around 1768.