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p. 2, b. 14-25
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Prezentacja
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b. 25
The change of the last note from e flat to A flat is definitely the result of Chopin's proofing of FE. That correction was also made in GET. The return to e flat in EE3 is an arbitrary revision made in that edition (on the basis of GE).
See b. 17
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category imprint: Differences between sources; Corrections & alterations
issues: Annotations in teaching copies, Accompaniment changes, Authentic corrections of FE, Annotations in GET
notation: Pitch