1 Rixdollar - George IV

The Rixdollar was a Dutch colonial currency inherited by Britain when Ceylon was ceded under the 1815 Treaty of Vienna's broader territorial settlements, and by 1821 it was already a currency on its way out. The British administration formally demonetized the Rixdollar in 1828, replacing it with sterling-based coinage — making this a transitional issue produced with full knowledge that the denomination had fewer than a decade left in circulation.

The .892 fineness departs slightly from standard sterling, a holdover specification from the Dutch monetary tradition the British chose not to immediately reform.