The 
time signature present in A1 seems to be more accurate for the melody written with minims and the quaver accompaniment. However, later in the piece, with numerous changes of time signature, it always returns as 
. Therefore, it seems that Chopin eventually opted for , which is confirmed by the copies based on [A2] – CJ and CK, in which this time signature was present from the beginning of the piece.
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category imprint: Differences between sources; Corrections & alterations
issues: 4/4 or 2/2
notation: Pitch