Issues : Last key signature sign

b. 33-48

composition: Op. 63 No. 3, Mazurka in C# minor

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In [A] (→FE1GE) Chopin wrote the middle section of the Mazurka in a key signature with four flats, although the prevailing key is D major, while from bar 41 even G major. Chopin corrected the key signature in FE2 (→EEW). Such discrepancy between the key signature and the prevailing key happened to Chopin in the Mazurka in G minor, Op. 33 No. 1, which both in the manuscripts and the editions is written down with 4 sharps. 

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Last key signature sign