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b. 74-75

composition: WN 17, Polonaise in B♭ major

..

In JC, there are additional naturals before e3 at the beginning of the last group in bar 74 and before e2 at the beginning of the 4th group in bar 75.

category imprint: Source & stylistic information

issues: Cautionary accidentals

b. 74-75

composition: WN 17, Polonaise in B♭ major

..

In JC there is no octave sign in those bars. It is probably an error, which is revealed by the analogy with the shape of figurations in bars 70-71, as well as by an unequivocal oversight of the octave sign in bar 71.

category imprint: Interpretations within context; Differences between sources

issues: Errors of JC

b. 75-76

composition: WN 17, Polonaise in B♭ major

No fingering in JC & PE

Fingering in EF

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The fingering of EF was probably added by Fontana.

category imprint: Differences between sources

b. 75

composition: WN 17, Polonaise in B♭ major

No mark in JC & EF

Wedge in PE

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The wedge, featured only in PE, probably comes from [A]. Cf. bar 71.

category imprint: Differences between sources

b. 75

composition: WN 17, Polonaise in B♭ major

..

None of the sources has the  lowering a1 into a1. In JC and EF, in which the first two demisemiquaver groups in this bar are written with the use of an octave sign (overseen in JC); however, one cannot even talk about an inaccuracy here, as the  before the note of this pitch is already in the 2nd group of demisemiquavers. 

category imprint: Interpretations within context

issues: Accidentals in different octaves , Omission of current key accidentals