Compliance of FC (→GE) and EE allows to suppose that B1 was also in [A], while G1 in FE is a result of Chopin proofreading. Most probably it was actually a correction of quite a frequently encountered mistake in Chopin's works concerning the number of ledger lines (cf., e.g., the Etude in Gmajor, Op. 10 No. 5, bar 72.
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category imprint: Differences between sources
issues: Errors in EE, Terzverschreibung error, Errors in the number of ledger lines, Authentic corrections of FE, Errors of FC
notation: Pitch