The autograph of this sonata, composed in 1789, was initially extant in Bückeburg under the title of 'Sonata per il Cembalo o Piano-Forte et Violoncello obligato' but was lost in the Second World War. The version then published was merely a substantially revised version which had been transposed to D major. Our new edition reconstructs the work's original state (in A major), taking the common performance practice principles of articulation and dynamics into account. A rewarding, yet fairly easy piece suitable for lessons and concerts which can be regarded as an important link to Beethoven's sonatas.