Commemorative silver coronation coin 1861 made into a brooch

This is a circulating commemorative silver coin made into a brooch. It is a 1 Thaler silver coin. It sais WILHELM KOENIG AUGUSTA KOENIGIN V. PREUSSEN 1861. It was to commemorate the Coronation of King Wilhelm I and Queen Augusta. From the tube hinge and the c-clasp you can tell it was made into a brooch around the time of the coin being made, victorian.
I will put it in my very small collection of coin jewelry.

https://en.numista.com/catalogue/pieces16991.html