Right. Neither do I. I guess you would need an “official” name to do that. LOL!
That’s what I’m thinking and I have no idea what their “official” name is.
Remember the days when manufacturers would put things in their products to get people to buy them? Things like towels, glasses, dishes in laundry detergent and such? These appear to be along the same line. They’d put the little pix in cigarette packs and people would try to get the whole set. This is nowhere close to the whole set but from what I’m seeing, each one tells a little bit of the story of WWI from the Germans’ perspective. A pretty neat little gimmick.