D-B Mus.ms. Bach P 271
D-B Mus.ms. Bach P 271 is an autograph manuscript by Johann Sebastian Bach.
The first part contains the six organ trio sonatas, the next includes the so-called Leipzig or Great 18 chorales, and the final contains another copy of Nun komm der Heiden Heiland, BWV 660a.
References
Part 1: Bach-digitalBachDigitalSource_source_00001202