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b. 33

composition: Op. 27 No 2, Nocturne in D♭ major

..

It is clearly visible in A that Chopin changed the last note in the left hand from f to a flat.

category imprint: Corrections & alterations

issues: Corrections in A , Accompaniment changes

b. 34

composition: Op. 27 No 2, Nocturne in D♭ major

..

 is missing before e in A (→GE1FEEE). ​This obvious mistake was corrected only in GE2.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals

b. 34

composition: Op. 27 No 2, Nocturne in D♭ major

..

In A there are traces of changing the 3rd semiquaver from to e and the 5th semiquaver from c sharp1 to a.

category imprint: Corrections & alterations

issues: Corrections in A , Accompaniment changes

b. 34

composition: Op. 27 No 2, Nocturne in D♭ major

..

The deletion in A allows one to see that originally Chopin wrote the sixth e2-c sharp3 as the 3rd quaver of the bar. The change was probably made after the whole bar had been written in - the proof of that is the   raising c2 to c sharp2 in the second half of the bar. 

category imprint: Corrections & alterations

issues: Corrections in A , Errors resulting from corrections

b. 34

composition: Op. 27 No 2, Nocturne in D♭ major

..

All the sources have the unnecessary  before c sharp2, the lower note of the 3rd semiquaver. This is probably a remnant of the initial version of the 3rd quaver of that bar.

category imprint: Editorial revisions; Source & stylistic information

issues: Errors resulting from corrections