NWA’s celebration of its 50th anniversary across the Pacific was most visibly highlighted by the special 747-400 WorldPlane livery
https://northwestairlineshistory.org/2019/07/22/reflections-extra-even-more-worldplane-photos/
In the June 1997 issue of WorldTraveler magazine, a timeline and photo essay was included in addition to the WorldPlane feature – click on the image above to read the full piece.