This is the extremely rare complete specimen set with perforation where the serial number would normally be found.
I plan to write about this one - again. I prepared a long document detailing the horrible and unfortunately many centuries-long story of the anti-semitic genocide, with translations, etc. But eBay took it down and I lost my only copy. For now, I will have to refer you to the German Wikipedia article on the Deggendorfer Gnad and point out the significance it would have to place this particular bishop on this note. I will try to get back to this one soon, my apologies.