 Numbers above BWV 1126 were added in the 21st century.An upper case R added to a BWV number indicates a reconstructed version, that is a conjectured earlier version of a known composition.One of such reconstructions, the Concerto for oboe and violin, as published in NBA VII/7 (Supplement) p. 75, based on the double harpsichord concerto BWV 1060, is known as BWV 1060R.