In FED, playing the g1-a1 second with the 1st finger was marked by Chopin in the way adopted by us in the main text. The same indication in FES has a form of only one big 'one', referring to both notes.
The reviser of EE2 (→EE3) also marked the performance of this chord in this way.
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category imprint: Differences between sources
issues: Annotations in teaching copies, EE revisions, Annotations in FED, Annotations in FES
notation: Fingering