20 Dollars - Charles III Milan & Prague

Tiffany glass coins — produced by inserting genuine art glass into a silver frame — emerged as a novelty format from the Czech mint operator Coin Invest Trust around 2005, initially for Pacific island issuers whose nominal sovereignty provided the legal fiction of a circulating denomination. Cook Islands has appeared on dozens of such issues over the decades, functioning as a convenient licensing arrangement rather than any expression of local monetary policy.

Milan and Prague were both imperial capitals under the Habsburgs, with the Milan mint operating under Spanish then Austrian authority for centuries before Napoleon suppressed it in 1800.