In FE (–>EE1) there is no 
to the bottom note of the last L.H. octave. The patent oversight, most probably by Chopin, was corrected in EE2 (→EE3). The correct notation is also to be found in GE.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, GE revisions, Errors repeated in FE, Errors repeated in EE
notation: Pitch