Redeeming mutilated coins from the junked cars imported from the US is apparently a significant source of income for recyclers based in China. They were sending so many coins to the US Mint that there was a major investigation to determine if the coins were counterfeit, and there were claims that they had redeemed more half dollar coins than the US ever minted in its history, and that the returned coins contained elements that were never used in the minting of circulating US coinage.
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