Some of the rarest world coins in the National Numismatic Collection
at the Smithsonian Institution’s Museum of American History are being
better preserved through the efforts of the Numismatic Guaranty Corp.
NGC has encapsulated, but not graded, more than 100 coins from all
six inhabited continents.
Among the coins encapsulated are an 1840 Russian platinum 12-ruble
coin, a 1906 Chinese gold tael and a 1906 Korean gold 20-won coin.
Read more in the April 14 weekly edition of Coin World.