In FE, the 
mark is placed over the first rest in the L.H., so that it is not entirely clear whether it applies to the chord at the beginning of the bar or to the note opening the semiquaver figurations. We assume the latter, much more likely both as far as the sources and music are concerned:
-
at the beginning of the 2nd beat of the bar, the gap between the bottom stave and the b note under the top one in [A] was probably too small to write , so that Chopin had to place it slightly before. It corresponds very well to the image of the text in FE, in which the mark is placed just at the level of the gap between the bottom stave and that b. In turn, if were supposed to apply to the 1st chord, there would be no reason to perform such shifts. This is how the notation of FE was understood both in GE and EE;
- the beginning of a similar semiquaver figure in bar 277 is also accented.
The absence of 
in GE is most probably an oversight.
Compare the passage in the sources »
category imprint: Graphic ambiguousness
issues: Inaccuracies in FE, Errors in GE
notation: Verbal indications