Elektron Musical Instruments

Hello 

 I would like to know if the white sticker on back of my machineddrum 
is the serial number. If it is how do I know if the machinedrum is 
one of the first 200 units with the bad 9 twist knobs. This is the 
number on the sticker  D20400357-45. So would this unit be 357 or 45 

                           Thanks in advance for any help.
                                           Miguel