The "K" numbers where used in Germany during the 80s for reissues. The first issues in the 70s used "ATL" or "SSK". First reissues came with GEMA, the next ones with "GEMA/BIEM" on labels and the last reissues had an additional barcode on the back of the sleeve.
This entry has been here for a while without any images. I was surprised to find I had a copy which appeared to fit the bill and have added a complete set of images. I'm not a Led Zeppelin expert by any means but searching around it appears that only Germany have used the "K 89400" cat number. I also found this item for sale which matches my copy exactly, which apparently means it was a 1980s reissue in Germany.
Die cut sleeve, the white folded insert is on the thin side, Boogie With Stu on Side 4 is misspelt as Boggie With Stu.