Chopin added a 
both in [A2] (→GE) and in the proofreading of FE; however, the range of the marks differs significantly: the mark in FE emphasises chiefly the very culminant chord, whereas the hairpin of GE creates a slightly further plane of escalation. In the main text we follow the principal source, i.e. GE, yet we consider the latest version of FE to be an equal variant. There is a similar situation in b. 67-68.
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category imprint: Differences between sources; Corrections & alterations
issues: Authentic corrections of FE
notation: Articulation, Accents, Hairpins