They impressively document the last phase of the Baroque era. The edition is based on an early copy which belonged to Johann Philipp Kirnberger. It bears the title "Sechs Sonatan für 2 fleutten von Friedemann Bach". The Duets Nos. 5 and 6 were added by another copist.
This edition has both flute parts on one system; two copies are needed for individual practice.