In FE (→GE1→GE2), all octaves in the L.H. in bar 297 and the first two in bar 299 are written in an abbreviated manner (top notes with 8s under them). According to us, one of those digits – the last in bar 297 – was perhaps left by mistake, which is indicated by a comparison with analogous bar 69. However, we do not suggest that version here, since the entire Tutti shows numerous minor differences between the first and second time, whereas the aforementioned quaver is provided with a 
mark in bar 297, which may be considered a justification of the sound enhanced with an octave.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions, GE revisions, Abbreviated octaves' notation
notation: Shorthand & other