I found it and put it in the frame, and now it's hanging on the wall, and I love it:
It has a few little "flea bites", but it was cheap and I was glad I spotted it!
You must understand, I REALLY look when I'm shopping!
Unfortunately, that paper is pretty darned dirty now, and I'd have liked their choice more if it had been blue and green, to go with the blue lids.
Oh, well - they were super-cheap, also, and I fear that the paper may not come off easily, so I might just re-cover them with a different color choice.
I'm on the lookout for some appropriately patterned vintage adhesive paper:
I had never seen this shape before, and I think they were probably part of a larger set: