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b. 72-75

composition: Op. 50 No. 2, Mazurka in A♭ major

No marks in A1 (→FEEE)

4 accents in GE1

3 accents in GE2

..

Just like in the previous bars, 4 subsequent accents must have been added in the proofreading of GE1 or earlier, still in [A2]. The mark in b. 74 is poorly visible, as a result of which it was overlooked in GE2. According to us, it is, however, a print defect and not a remaining element after removal of that accent.
The marks in GE1 slightly differ in size, which we, however, consider to be irrelevant: see the note in b. 60-64.  

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

issues: Errors in GE , Authentic corrections of GE

b. 72

composition: Op. 50 No. 2, Mazurka in A♭ major

Slur in A1 & GE

No slur in FE (→EE)

..

The missing slur must be a mistake of the engraver of FE (→EE).

category imprint: Differences between sources

issues: Errors in FE

b. 73-81

composition: Op. 50 No. 2, Mazurka in A♭ major

5 "vertical" slurs in A1 & GE1

Conventional slur in bar 73 in FE

No slurs in EE

5 conventional slurs in GE2

..

In b. 73, 75, 77-78 and 81, in the main text we give the only authentic notation of A1 and GE1, which is, moreover, concordant, in which the slurs next to the grace notes reach the bottom note of the following quaver. The versions of FE and EE result from mistakes and inaccuracies, whereas in the case of GE2 – from revision.

category imprint: Differences between sources

issues: Errors in FE , Inaccuracies in FE , Errors in EE , GE revisions

b. 74-76

composition: Op. 50 No. 2, Mazurka in A♭ major

No markings in A1 & EE

Pedalling in FE & GE

..

In b. 74 and 76, in the main text we include the pedalling added by Chopin in the last stage of proofreading of FE and in [A2] or in the proofreading of GE1.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Authentic corrections of GE

b. 74

composition: Op. 50 No. 2, Mazurka in A♭ major

No indications in A1 (→FEEE)

cresc. ritenuto in GE

..

Chopin added the cresc. and ritenuto indications in the proofreading of GE1 or in [A2].

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of GE