Issues : Last key signature sign

b. 1-2

composition: Op. 28 No. 18, Prelude in F minor

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In A in both bars Chopin wrote and then crossed out the flats (cautionary?) before the 1st d quaver.

category imprint: Corrections & alterations; Source & stylistic information

issues: Cautionary accidentals , Deletions in A , Last key signature sign