I was perusing an ag and mechanical parts store based in western Canada the other day. Was a bit surprised to see NW-logoed economy service items (trays, tea cups, dishes) for sale. These are the grey with white interior ones and not sure how old they are.
The tray could be NW or it might be some other airline. Do you see any actual NW-logoed items there on that site? There are a few thousand listings there for various goofy surplus things, but I couldn't find anything else Northwest related.
Had the Northwest logo in raised moulded print on the back. Not NWA or the Compass but Northwest in block italic (if it makes sense). There were mugs and the long narrow dishes but I see they're not listed on the website but they are in the stores.
Not nostalgic enough to buy anything at a buck (+12% tax) each.