A much rarer error is a denomination struck on a foreign planchet. This did occur occasionally with United States (and before that American colonial) coinage in the 17th, 18th, and 19th centuries. In the 20th century, less errors on foreign planchets are discovered but they still occur when the US Mint is contracted by foreign governments to produce coinage for them. Recent encapsulations and sales at auctions reveal 1995 and 1996 examples of mintages on foreign planchet. A few 1996 Lincoln cents were struck on stock designated for Singapore. There are 1997-D, 1998 and 2000 dated Lincoln cents struck on foreign planchets, but not identified by PCGS or NGC as to the country the mintage was intended.