Issues : 4/4 or 2/2

b. 1

composition: Op. 28 No. 18, Prelude in F minor

 in A (→FCGE)

 in FE (→EE)

..

The  marking present in FE (→EE) instead of the authentic  indication must have resulted from the engraver's carelessness – see the Prelude in E minor no. 14.

category imprint: Differences between sources

issues: Errors in FE , 4/4 or 2/2