I used to despise those ugly things. I much preferred the little window. However, I now know the real reason for them. They're perfect picture frames for commemorative stamps. The slots are about the right size for most commemoratives, and there's no shortage of themes to choose from. As for film info, that's what masking tape, a sharpie pen and the bottom of a camera body are for. The one shown below is apt, since on the other side of the camera is a shift lens.