nissan micra radio code

I have a 2005 micra. The battery died and I don't have the radio code. It seems to be a different radio than most of the ones listed here. I think it's not blaupunkt.
The number I found on the radio is 55610134112. It also says Nissan MM CD-K (BLK). Can you help? The silence is deafening.
 
wrong serial number

Turns out it IS a blaupunkt radio. The serial number is BP 334947297382. Please help with the code.
 
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