Non-Circulating “Legal Tender” (NCLT) is a category coins produced in the name of various countries for the sole purpose of making money through sales on the numismatic market. If you show such a coin to the man on the street in the country of issue you will probably get a puzzled look and a question like “what is this?” Private mints or promotors would get a small county or official to sign off on the idea for a percentage of the sales minus the production expenses. For example Liberia issued a 25 dollars silver coin in 1997. This two and a half ounce pure silver coin commemorates the 25th anniversary of the Standard Catalog of World Coins published in Iola, Wisconsin. The promoter of this idea was Krause Publications, publisher of the Standard Catalog. Pobjoy Mint (private mint in London) produced 2,500 proofs of these coins and the entire production was distributed by KP as subscription premiums and gifts to employees. It was a great idea but sadly a large number of these coins were given to non-collectors who quickly sold their coins to silver buyers for scrap value. How many of the original mintage that still survive is anyone's guess.
