Page:
Source:
p. 2, b. 17-34
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In A (→FE) Chopin omitted the naturals raising B
1 to B1, C to C and c to c. The second of them was added in FES. In GE a 
was added at the end of bar 18, yet both signs in bar 19 appeared only in GE3 (→GE4→GE5). EE has the correct text.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: Annotations in teaching copies, EE revisions, Accidentals in different octaves, GE revisions, Omission of current key accidentals, Annotations in FES
notation: Pitch
Missing markers on sources:
A, FE1, FE2, FED, FEJ, FES, GE1a, GE2, GE3, GE4, GE5, EE2, EE3, EE4, GE1