An abandoned start of a Rondo in C major, D. 309A (mentioned p. 173 in the 1978 version of the Deutsch catalogue however without a catalogue number being assigned to it at the time, so in several publications mentioned as D deest), dated 16 October 1815, is another candidate for what Schubert might have intended as last movement for this sonata.

Date of composition 1815 (unfinished)
First published 1888
Type Sonata
Tonality C Major
Catalogue D 279
Instruments Piano
Autotranslations beta Franz Schubert: Sonate pour piano n°2 en do majeur, D 279
Franz Schubert: Sonata per pianoforte n. 2 in do maggiore, D 279
Franz Schubert: Sonate Nr. 2 für Klavier C-dur, D 279