Musical sketch, K. 626b/12 : autograph manuscript, 1782-1783.

A leaf, which most likely dates from 1782 or early 1783, containing two unrelated sketches. The top four staves, above which Mozart has written "Largo," show the beginning of a canonic or fugal section from an unidentified work. The bottom two staves, marked "Coro" (chorus), may well be a sketch for the Mass in C minor, K. 427/417a; parts of the autograph manuscript of that mass are written on the same paper-type as this sketch.