Platinum Proof Coin Series | U.S. Mint

https://www.usmint.gov/news/press-releases/united-states-mint-announces-new-one-ounce-platinum-proof-coin-series?cm_mmc=ExactTarget--Campaign--20171023+News+Release+USM+New+Platinum+Proof+Coins-_-NewPlatinumProofCoins&utm_source=Campaign&utm_medium=EMAIL&utm_content=NewPlatinumProofCoins&utm_campaign=20171023+News+Release+USM+New+Platinum+Proof+Coins&cm_mmca1=NewsRelease&cm_mmca2=All&cm_mmca3=PlatinumProofCoins

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