The absence of c1 in the last chord is most probably an oversight by the engraver of GE (→FE,EE) caused by the notation of A, which is not entirely clear. The presence of this note in AsI, however, is a strong argument for a similar interpretation of the notation of A.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Errors in GE, Uncertain notes on ledger lines, Inaccuracies in A
notation: Pitch