A (→GE) has triads as the 2nd and the 3rd crotchets of those bars, although in the first triad in bar 127 the note c1 is practically invisible in the manuscript. When proofing FE, Chopin removed the middle notes of the triads leaving only the sixths. That corrected version was repeated in EE1 (→EE2). EE3 returned to the version of GE1 with the full triads (the omitted note b flat on the 2nd beat of bar 128 must be a mistake).
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations
issues: EE revisions, Authentic corrections of FE, Uncertain notes on ledger lines
notation: Pitch