D-B Am.B 430
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D-B Am.B 430 is a manuscript in Staatsbibliothek, Berlin. It contains 10 preludia by Dietrich Buxtehude and the Preludium in G Major and Nun komm der Heiden Heiland by Nicolaus Bruhns. It is a copy of D-B Am.B 462 by the same copyists of that manuscript, and it was made for Anna Amalia, Princess of Prussia.
References
Beckmann, Klaus (editor), D. Buxtehude: Sämtliche Orgelwerke. Wiesbaden: Breitkopf & Härtel, 1997. Source E4 (the signature is written Mus.ms. Am. 430)