This bloodline traces back the sires to what have been identified as the 3 foundation lines of the German Shepherd. Mutz von der Pelztierfame, Quanto von der Wienerau and Canto von der Wienerau.
The bloodlines may not be complete either because no information is available or the data has not yet been completed. 

Sire Bloodlines for
Biene Berkelau
 
Oldo vom Wasserrad
Uwe vom Kirschental
Drigon vom Fuhrmannshof
Enno vom Antrefftal