Issues : 4/4 or 2/2

b. 1

composition: Op. 21, Concerto in F minor, Mvt I

in A

in GE (→FEEE)

..

Change of the time signature from  to  is one of the most characteristic inaccuracies of first editions of Chopin's works – see e.g. the Sonata in B minor, Op. 35, 1st mov., bar 1.

category imprint: Differences between sources

issues: Errors in GE , 4/4 or 2/2 , Errors repeated in FE , Errors repeated in EE