Stoneridge Engineering – Theory of Operation of the Quarter Shrinker Citat: "...In an opinion letter, the US Mint "frowns on the despicable practice" of altering coins, but they agree that it is quite legal to shrink coins. Note that this may not be the case within other countries! For example, in the UK and Australia, defacing the Queen's image on a coin may be considered a punishable offense..."
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