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Fingering

b. 22-23

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE)

Additional fingering in EE

..

In EE Fontana added alternative, inauthentic proposals to the fingering given in the main text of FE (→GE,EE), which was undoubtedly written by Chopin.

category imprint: Differences between sources

issues: EE revisions

b. 27-37

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE)

Fingering in EE

..

The fingering in bars 27-30, 32-35 and 37 from FE (→GE,EE) adopted in the main text is certainly authentic (see however bar 27). In EE Fontana completed it in bar 36, according to the fingering resulting from Chopin's indications in the previous bar.
In GE4 (→GE5) the 5 digit over cin bar 37 was omitted.

category imprint: Differences between sources

b. 27

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

3 on c1 in FE (→GE)

4 on c1 in EE

..

The difference in fingering between the first and the second four-note group of semiquavers, the only one in the entire Etude, raises doubts whether one of the digits – 3 over cor 4 over c2 – is not a mistake. It was probably what the reviser of EE (Fontana?) thought, taking the decision to change the digit over c1 from 3 to 4.

category imprint: Differences between sources

issues: EE revisions

b. 31

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE)

Fingering in EE

..

Apart from the fingering of FE (→GE,EE) given in the main text, which certainly comes from Chopin, Fontana proposed an additional, alternative solution in EE.

category imprint: Differences between sources

issues: EE revisions

b. 38-50

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE1GE2GE3)

Additional fingering in EE

Additional fingering in GE4 (→GE5)

..

The fingering in bars 38-45 and 47-49, originating from FE (→GE,EE) and adopted to the main text, is certainly authentic. In EE Fontana added to it 29 digits in bars 42, 44, 46 and 50; the additions do not change the fingering stemming from Chopin's indications. At the beginning of bar 42 an arbitrary completion of the fingering's digits was performed also in GE4 (→GE5). 

category imprint: Differences between sources

issues: EE revisions , GE revisions