| Köchel | Date | Location | Work | Key |
| 301 | 1778 | Mannheim | Sonata for Piano & Violin | G Major |
| 302 | 1778 | Mannheim | Sonata for Piano & Violin | E Flat Major |
| 303 | 1778 | Mannheim | Sonata for Piano & Violin | C Major |
| 304 | 1778 | Paris | Sonata for Piano & Violin | E minor |
| 305 | 1778 | Paris | Sonata for Piano & Violin | A Major |
| 306 | 1778 | Paris | Sonata for Piano & Violin | D Major |
| 307 | 1777 | Mannheim | Arietta `Oiseaux, si tous les ans' | . |
| 308 |
1778 | Mannheim | Arietta `Dans un bois solitaire' | . |
| 309 |
1777 | Mannheim | Sonata for Piano | C Major |
| 310 |
1778 | Paris | Sonata for Piano | A minor |
| 311 |
1777 | Mannheim | Sonata for Piano | D Major |
| 311a | 1778 | Paris | (App. 8) Overture (Doubtful) | B Flat Major |
| 312 | 1774 | Salzburg | Allegro of a Piano Sonata | G minor |
| 313 |
1778 | Mannheim | Concerto for Flute | G Major |
| 314 |
1778 | Mannheim | Concerto for Flute (or Oboe) | D Major |
| 315 |
1778 | Mannheim | Andante for Flute & Orchestra | C Major |
| 315a | 1779 | Salzburg | 8 Minuets | . |
| 316 | 1778 | Paris | Recitative & Aria for Soprano `Popoli di Tessaglia' | . |
| 317 |
1779 | Salzburg | Mass `Coronation' | C Major |
| 318 | 1779 | Salzburg | Symphony No. 32 (Overture) | G Major |
| 319 | 1779 | Salzburg | Symphony No. 33 | B Flat Major |
| 320 | 1779 | Salzburg | Serenade No. 9 `Post Horn' | D Major |
| 321 | 1779 | Salzburg | `Vesperae de Dominica' | C Major |
| 322 | 1778 | Mannheim | Kyrie (Fragment) | E Flat Major |
| 323 | 1779 | Salzburg | Kyrie (Fragment) | C Major |
| 324 | 1779 | ??? | Hymn `Salus infirmorum' (Doubtful) | . |
| 325 | 1779 | ??? | Hymn `Sancta Maria, ora pro nobis' (Doubtful) | . |
| 326 | 1771 | Salzburg | Hymn `Justum deduxit Dominus' | . |
| 327 | ??? | ??? | Hymn `Adoramus te' (by Gasparini) | . |
| 328 | 1779 | Salzburg | Sonata for Organ & Strings `Church' | C Major |
| 329 | 1779 | Salzburg | Sonata for Organ & Strings `Church' | C Major |
| 330 |
1778 | Paris | Sonata for Piano | C Major |
| 331 |
1778 | Paris | Sonata for Piano `Alla Turca' | A Major |
| 332 |
1778 | Paris | Sonata for Piano | F Major |
| 333 |
1778 | Paris | Sonata for Piano | B Flat Major |
| 334 | 1779 | Salzburg | Divertimento No. 17 | D Major |
| 335 | 1779 | Salzburg | 2 Marches for Orchestra | D Major |
| 336 | 1780 | Salzburg | Sonata for Organ & Strings `Church' | C Major |
| 337 | 1780 | Salzburg | Mass `Missa solemnis' | C Major |
| 338 |
1780 | Salzburg | Symphony No. 34 | C Major |
| 339 |
1780 | Salzburg | Vesperae solemnes de confessore | C Major |
| 340 |
1780 | ??? | Kyrie (lost; doubious) | . |
| 341 | 1781 | Munich | Kyrie | D minor |
| 342 | ??? | ??? | Offertorium `Benedicite angeli' (by Leopold Mozart) | . |
| 343 | 1779? | Salzburg | 2 German Church songs | . |
| 344 | 1779 | Salzburg | Opera (Singspiel) `Zaide' (incomplete) | . |
| 345 | 1779 | Salzburg | Opera - Choruses & Interludes for `Koenig Thamos' | . |
| 346 |
1783 | Vienna | Notturno `Luci care, luci belle' for 3 Voices with 3 Basset Horns | . |
| 347 | 1782 | Vienna | Canon `Lasst uns ziehn' | . |
| 348 | 1782 | Vienna | Canon `V'amo di core teneramente' | . |
| 349 |
1780, 1781 | Munich | Song with Piano, Die Zufriedenheit `Was frag ich' | . |
| 350 | ??? | ??? | Song with Piano `Schlafe mein Prinzchen' (by Bernhard Flies) | . |
| 351 | 1780, 1781 | Munich | Song with Mandolin `Komm, liebe Zither' | . |
| 352 | 1781 | Vienna | 8 Variations for Piano `Les Mariages samnites' | . |
| 353 | 1778 | Paris | 12 Variations for Piano `La belle Francoise' | . |
| 354 |
1778 | Paris | 12 Variations for Piano `Je suis Lindor' | . |
| 355 |
1790 | Vienna | Minuet for Piano | D Major |
| 356 | 1791 | Vienna | Adagio for Glass harmonica | C Major |
| 357 |
1786 | Vienna | Piano Sonata for Four Hands (Fragment) | G Major |
| 358 |
1774 | Salzburg | Piano Sonata for Four Hands | B Flat Major |
| 359 | 1781 | Vienna | 12 Variations for Piano & Violin `La Bergere Celimene' | . |
| 360 | 1781 | Vienna | 6 Variations for Piano & Violin `Helas, j'ai perdu mon amant' | . |
| 361 | 1781 | Munich -Vienna | Serenade No. 10 for Winds (See K. 46) | B Flat Major |
| 362 | 1780, 1781 | Munich? | March (Idomeneo) | C Major |
| 363 | 1780 | Salzburg | 3 Minuets | . |
| 364 |
1779 | Salzburg | Sinfonia concertante for Violin, Viola & Orchestra | E Flat Major |
| 365 | 1779 | Salzburg | Concerto for 2 Pianos No. 10 (See K. 624) | E Flat Major |
| 366 |
1780 - 1781 | Salzburg - Munich | Opera seria `Idomeneo, re di Creta' | . |
| 367 |
1781 | Munich | Ballet Music to Idomeneo | . |
| 368 | 1781 | Munich | Recitative & Aria for Soprano `Ma, che vi fece, o stelle' | . |
| 369 | 1781 | Munich | Scena & Aria for Soprano `Misera, dove son!' | . |
| 370 | 1781 | Munich | Quartet for Oboe & Strings | F Major |
| 371 | 1781 | Vienna | Rondo for Horn & Orchestra (sketch) | E Flat Major |
| 372 | 1781 | Vienna | Allegro from a Sonata for Piano & Violin (Fragment) | B Flat Major |
| 373 | 1781 | Vienna | Rondo for a Violin Concerto | C Major |
| 374 | 1781 | Vienna | Recitative & Aria for Soprano `Or che il cielo' | . |
| 375 | 1781 | Vienna | Serenade No. 11 for Winds | E Flat Major |
| 376 | 1781 | Vienna | Sonata for Piano & Violin | F Major |
| 377 | 1781 | Vienna | Sonata for Piano & Violin | F Major |
| 378 | 1779 | Salzburg | Sonata for Piano & Violin | B Flat Major |
| 379 | 1781 | Vienna | Sonata for Piano & Violin | G Major |
| 380 | 1781 | Vienna | Sonata for Piano & Violin | E Flat Major |
| 381 |
1772 | Salzburg? | Piano Sonata for 4 hands | D Major |
| 382 | 1782 | Vienna | Rondo for Piano & Orchestra | D Major |
| 383 | 1782 | Vienna | Aria for Soprano `Nehmt meinen Dank' | . |
| 384 | 1781, 1782 | Vienna | Opera (Singspiel) `Die Entfuehrung aus dem Serail' | . |
| 385 |
1782 | Vienna | Symphony No. 35 `Haffner' | D Major |
| 386 | 1782 | Vienna | Rondo for Piano & Orchestra | A Major |
| 386d | 1782 | Vienna | (App. 25) Recitative `O Calpe' (Fragment) | . |
| 387 |
1782 | Vienna | Quartet for Strings No. 14 | G Major |
| 388 | 1782 | Vienna | Serenade No. 12 for Winds (See K. 406) | C minor |
| 389 | 1782 | Vienna | Duet `Welch aengstliches Beben' (Die Entfuehrung) | . |
| 390 |
1780 | Salzburg | Song with Piano `Ich wuerd auf meinem Pfad' | . |
| 391 |
1780 | Salzburg | Song with Piano `Sei du mein Trost' | . |
| 392 | 1780 | Salzburg | Song with Piano `Verdankt sei es dem Glanz' | . |
| 393 | 1782 | Vienna | `Solfeggi' for Soprano | . |
| 394 |
1782 | Vienna | Fantasia & Fugue for Piano | C Major |
| 395 |
1778 | Paris | Capriccio for Piano | C Major |
| 396 |
1782 | Vienna | Adagio for Piano & Violin (Fragment) | C minor |
| 397 |
1782 | Vienna | Fantasia for Piano | D minor |
| 398 | 1783 | Vienna | 6 Variations for Piano `Salve tu, Domine' | . |
| 399 | 1782 | Vienna | Suite for Piano | C Major |
| 400 |
1781 | Vienna | Allegro of a Sonata for Piano | B Flat Major |
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