The German rental edition came with a sticker on the front. The title text is printed in silver. It may have come with a folder or sheet with the same catalog number as the retail edition.
There may be a variant with a hyphen in the catalog number on the spine, 46-89 9.
3. Scanned front, silver title appears black
4. Scanned back, silver titles appear black
Thanks to eBay members stammesfuerst (image 1), sphinxx0815 (image 2), and hakver-shop (images 3-4), and CDcovers.cc (image 5).