Manuscript Mus. Ms. 30439 owned by the Staatsbibliothek zu Berlin contains five different fascicles, some reasonably preserved, others deteriorated to the point of not being readable anymore. The second fascicle contains 16 chorale preludes of unnamed composers. Four of these are from others sources known to be composed by Johann Pachelbel and three of them by Johann Michael Bach. But the composer of the other 9 remain uncertain.
This edition contains all 16 pieces. I uploaded all of them to the concert hall. Now they are integrated into one edition. I made a new recording of the prelude I like most, the prelude on "Komm heiliger Geist, Herre Gott" by an unknown composer (which could well be Pachelbel).