Six consecutive 
signs visible in FE (→GE,EE) can denote only long accents in this context. In the group of the first pieces published by Chopin in Paris, long accents, whose meaning the engravers generally did not understand, would be often deformed – cf. e.g. the Etude in A minor, op. 10, no. 2, bar 12 (a similar context to the one of the discussed place of the Concerto is to be found in the Etude in C major, op. 10, no. 1, bars 69-70).
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category imprint: Interpretations within context; Editorial revisions
issues: Long accents
notation: Articulation, Accents, Hairpins