1 in 
In the main text we give c
1 after A (→FE→EE2→EE3). A similar harmonic progression is often to be found in Chopin's works, e.g., in the Etude in E major, No. 11, bars 23-25, therefore, there is no reason to suspect that Chopin overlooked a 
in this place. However, in GE (and EE4) a was added before this c1, changing it into c1. Completing the missing accidentals was the basis of revision in GE, yet Chopin's intention was not always correctly identified (cf., e.g., the Etude in C major, No. 1, bar 46, A minor, No. 2, bar 7, A major, No. 10, bars 23 and 35). A similar change of c1 into c1 was performed in the ending of the Nocturne in B minor, Op. 9 No. 1, published a little bit earlier in the same publishing house (the 11th quaver in bar 83); the change, being an obvious mistake, shows the schematic approach of the edition's reviser.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions, GE revisions
notation: Pitch