JC
Main text
JC - Jędrzejewicz Copy
PE - First Polish Edition
EF - Editions by Fontana
FEF - French edition by Fontana
GEF - German edition by Fontana
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  b. 5-6

In JC, there are no flats lowering a and a1 into a and a1. The undeniable oversight of Chopin in [A] (→JC) is revealed by the cautionary  before in bar 7. 

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category imprint: Differences between sources

issues: Cautionary accidentals, Omission of current key accidentals, Errors of JC

notation: Pitch

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