2022 Tuvalu The Simpsons 1 oz Colorized Treehouse of Horror Proof Silver Coin. For fans of The Simpsons, this spooky 1oz silver release marks its eeriest episodes of the year! 99.99% pure silver. Glow in the dark packaging. Obverse side features an effigy of the late Queen Elizabeth II. Reverse side features colorized artwork of a “Treehouse of Horrors” opener. Limited mintage of 5,000 pieces!