Here’s a neat case of self-perpetuating archaeology. Medieval history spawned sword & sorcery literature. This literature spawned tabletop fantasy role-playing games and Medieval re-enactment groups. These games and groups spawned live action role playing. And now the larpers have created a market for faux-Medieval coinage, which they are buying at game stores, using at larps and dropping here and there. Metal detectorists are starting to find coins like the one in the picture and submitting them to intrigued museum curators.
It's amusing that LARP coins are starting to become accidental artifacts. What I find even more surprising is the remark in the comments that Toys "R" Us stores in Sweden sell LARP supplies. I knew live action was big in Scandinavia, but I never realized it was so mainstream.