From memory: one of a long series of medals based on historic large silver coins. The thin, copper excecution makes them unfit as a luxury article, so my best guess is that they were used for educational purposes. I am thinking of rich spoiled brats trying to make the life of their private tutors as nasty, brutal and short as possible.

The series came about in the period right after Napoléon, IIRC, where there was no longer demand for counters and the Nürnberg toy makers were looking for a different application of their skills in the face of competition from the UK, fed by steam engines. In the end, the British makers settled on game counters and fillers for coin holders, while the Germans captured the dolls house (toy) money and educational market.
Peter