RE: Starting a new (stacking) adventure

I see you are from the Netherlands. Here, in the Czech Republic, such tubes are also sold in 20 pieces. I don't know why I thought of 25...
https://www.goldasilver.com/1-unce-311-gramu/392-stribrna-mince-1-oz-wiener-philharmoniker.html?SubmitCurrency=1&id_currency=2