In A Chopin introduced here only a four-flat key signature. He rectified his mistake in the last proofreading of FE (→EE); however, the misleading notation remained without correction in GE. Interestingly enough, AI includes the correct notation, whereas in As, in spite of the fact that the change of key before the D
major section is not marked at all, the absence of flats before most of the g notes and the presence of naturals before g suggests a five-flat key signature.
Compare the passage in the sources»
category imprint: Differences between sources; Source & stylistic information
issues: Errors of A, Authentic corrections of FE, Last key signature sign
notation: Shorthand & other