Mozart’s works for piano duet are amongst the most important contributions to this repertoire. This scholarly-critical edition based on the “New Mozart Edition” makes these works available in a revised form and includes a new foreword. The publication also contains an appendix with the fragments K. 497a (Fr 1787i) and K. 500a (Fr 1791a) which are completed by Michael Töpel, as well as individual pieces for organ, mechanical organ and musical clock in transcriptions for piano duet. Informative forewords to the main part and the appendix together with explanatory notes on the evaluation of the sources complete this volume, which will be indispensable for both teachers and performers. - Newly engraved revised Urtext edition based on the “New Mozart Edition”, taking the latest findings into account - First arrangement for piano duet of Mozart’s Andante in F for musical clock K. 616 - Lead-ins and fermata ornamentations by Michael Töpel - Includes detailed forewords (Ger/Eng) and information on the evaluation of sources (Ger/Eng) Einleitung (Wolfgang Rehm) Quellen und Kommentare Introduction (Wolfgang Rehm) Sources and Commentary Works for Piano Duet: Sonata D major K. 381 (123a) Sonata B major K. 358 (186c) Sonata F major K. 497 Andante with Five Variations G major K. 501 Sonata C major K. 521 Allegro G major K. 497a (Fr 1787i) Fragment Andante G major K. 500a (Fr 1791a) Fragment Opus Incertum. Sonata C major K. 19d Opus incertum Appendix: Einleitung (Michael Töpel) Introduction (Michael Töpel) Fragments K. 497a (Fr 1787i) and K. 500a (Fr 1791a). Completed by Michael Töpel: Allegro G major K. 497a (Fr 1787i) Fragment, completed by Michael Töpel Andante G major K. 500a (Fr 1791a) Fragment, completed by Michael Töpel Miscellaneous Works for Organ, Mechanical Organ, and Musical Clock Transcribed for Piano Duet: Fuga for Organ G minor K. 401 (375e) (Fr 1772g) Transcribed for Piano Duet Fragment, completed by Maximilian Stadler Adagio and Allegro for Mechanical Organ F minor K. 594 Transcribed for Piano Duet Allegro and Andante (Fantasia F minor) for Musical Clock K. 608 Transcribed for Piano Duet Andante for Musical Clock F major K. 616 Transcribed for Piano Duet by Michael Töpel