The shape of the accent in A suggests that it is a long accent. It is even more evident in similar b. 470. In FC (→GE) both marks were reproduced as common short accents. Taking into account the fact how carefully Chopin reviewed FC, the absence of corrections in those and similar places may mean that Chopin did not always consider the type of accent used to be a priority. We consider the version with a short accent featured in the principal source to be an acceptable variant.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Long accents, Errors in FE, Inaccuracies in FC
notation: Articulation, Accents, Hairpins