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Coinage

Illegal Coins 

            If you’ve read the article on high denominations you’ll know that there’s at least one note that’s illegal to
 own.  But did you know that there are a few coins that are illegal as well?  These include the famous 1933 $20  Double Eagle (with exception to one specimen that was allowed), and the 1974 aluminum cent.
 

        1933 $20 Gold 

            April of 1933 marked the end for the gold standard in the United States.  Thus, after 1933 there would be  no more gold coinage produced for circulation.  Although nearly half a million were minted, they were never  officially released for circulation, and the mint has deemed them illegal to own.  There is, as mentioned, one that  exists in private hands, and sold for about $7.5 million at auction (in 2002).  The other ones are owned by the  government, and I believe some have been leased to the Smithsonian.      

       1974 1c (Aluminum) 

            In 1973 copper prices were going up, and the Mint decided to look for other options for cents.  Aluminum  was decided on, and there were in fact nearly 1.6 million minted in aluminum for anticipation of their release the  following year (thus dated 1974).  They were handed out to members of congress and their staff (similar to  pattern pieces, although, typically there are only enough for congress members when a pattern piece is  created).  Eventually the entire mintage was destroyed (as the proposition was rejected), except it appears as  though some had escaped, either they were lost or purposefully not returned.  Much like the 1933 $20 Gold, if it’s  found that you own one of these they can be subject to seizure by the government.