Op. 2, Variations in B♭ major
Op. 10, 12 Etudes
Op. 11, Concerto in E minor
Op. 21, Concerto in F minor
Op. 22, Polonaise in E♭ major
Op. 24, 4 Mazurkas
Op. 25, 12 Etudes
Op. 26, 2 Polonaises
Op. 27, 2 Nocturnes
Op. 28, 24 Preludes
Op. 30, 4 Mazurkas
Op. 35, Sonata in B♭ minor
Op. 50, 3 Mazurkas
Op. 63, 3 Mazurkas
Op. 64, 3 Waltzes
Op. 26 No 2, Polonaise in E♭ minor
As in bar 37 A has no accidentals before the first quaver. The sharps necessary to indicate notes c, c1, c2 were not written by Chopin until the last semiquaver in the bar, and only in the R.H. The editions filled in the essential signs and GE2 (→GE3→GE4) and EE2 added an extra 
before c at the end of the bar.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Editorial revisions
issues: EE revisions, GE revisions, Omission of current key accidentals, FE revisions
notation: Pitch