Trumpets, Horns, and Bach «Abschriften» at the time of Christian Friedrich Penzel: Probing the Pedigree of «BWV» 143

There can be no doubt as to the authenticity of BWV 143 as a genuine cantata by Johann Sebastian Bach. While the originals are lost, there are second and third «generation» copies. This study considers all known facts since the work’s composition in the 18th century and discusses in detail the criteria for judging the authenticity of the work.