Awesome! I have one of those! :D In the Netherlands we have 'Gouden tientjes' en 'Zilveren tientjes'
https://www.goudnl.nl/zilveren-tientje
https://www.thesilvermountain.nl/nl/gouden-tientje
'Tientje' is the 'Tien' (10) referring to the amount of Gulden (the currency we had before the euro) it is in silver. I often heard people getting excited about these when I was younger having no idea what it meant :')