While the opening movement is indisputably by Mozart, the elaboration of the Rondo must now be attributed to Sussmayr. This movement is transmitted solely as a sketch in Mozart's hand. The present edition contains both the Sussmayr Rondo (K. 514 = smWV 502) and the Mozartian Rondo fragment (K. 412) which was carefully completed by Wiese. The performer will thus have the choice between the traditional version (with Sussmayr) and the version presumably intended by Mozart, all in one practical edition.