These are mahjong tiles that I found at my parents' house. I've only used them about twice. They've been left untouched for several years, so they've deteriorated slightly. They're black tiles, which are rare and make for a good novelty item. With the end of the year approaching, they might be fun to use! As you can see in the photos, the East-South plate is stuck to the inside of the lid and has left an impression. It doesn't bother me much though...