Violin Concerto No. 7 (Mozart) to the insertion of new works bearing the numbers K. 271b to K. 271H in the catalogue. He believed that the work was based on a rough sketch of a violin concerto by Mozart from 1777, but states that the original form of the work cannot easily be reconstructed. The uncharacteristic number of passages for the solo violin in the high register, in "pizzicato" (in the second movement), and in double stops in tenths were considered by Einstein to be 19th-century additions. Friedrich Blume, on the other hand, was firmly in favour of the work's authenticity, stating that "not one
Schubert opus/Deutsch number concordance Schubert opus/Deutsch number concordance Franz Schubert (31 January 1797 – 19 November 1828) was an Austrian composer. This is a concordance of those compositions by Schubert that were given opus numbers, and their corresponding Deutsch catalogue numbers. Only a small minority of Schubert's works were published in his lifetime. Not all published works were allocated opus numbers, and the sequence of opus numbers that were allocated bore little relationship to the order in which the works were either composed or published. For example, the first of his works to be published, the song "Die Forelle", was given the opus number