Does Abus print blind bitting codes on their D-Lock bikes (or do thieves go through the trouble to
As per question, I had e-mailed the manufacturer (Abus) regarding the meaning of the number.  Apparently it is the serial number of the item (bike lock) itself.  Also Per e-mail from the manufacturer, 


  "Due to security reasons it is not possible to order spare keys with this number".  


On each YourPlus key card is the YourPlus code for your key/lock as well as the lock's serial number.  I'm not sure if Abus partners would be able to request a new key for serial number x (perhaps a thief working at a key shop) or look up yourplus codes for specific serial numbered locks, though I highly doubt the latter.