"The stamps can be used for approaching school graduation ceremonies either when sending letters of invitation or as a special memory of the day. A new feature is that the stamps are not marked with a specific monetary value but rather with a category of use so they can flexibly be used for postage without additional payment even if postal tariffs change. The sheet has two alternating stamp designs, one with the symbols of school graduation (a diploma, a satchel and a mortar board) and the other with objects associated with studying (a book, an ink well and a quill). "