It's a 5.2 kW Thermo Top C. I.. umm.. "digitally enhanced" one of the pictures for you. Mostly it helped that I knew what to look for in the label, but I also leaned on a nice clean picture from
eBay, which also happened to have the label in English rather than German, to work out some of the details.
That one on eBay has part number 89073P. I can make out 073 on your label, but overall I think your part number may be 89073N.
I'll leave the extraction of the serial number as an exercise to the reader.