Autographs
The autograph (original manuscript copy) of K. 560a has survived; it is a "tiny slip of paper" (Searle) on the reverse side of which is the original of K. 559. For discussion, see Difficile lectu (Mozart). The later G major version is also preserved and is currently in the Mozarteum in Salzburg.
Read more about this topic: O Du Eselhafter Peierl (Mozart)