1820 British West Indies 1/8 Dollar

"Anchor Money" was Britain's second attempt at issuing a replacement " Trade dollar" coinage for use in its colonies and in general trade. It wasn't particularly successful, and the British government abandoned it after only two years and formally switched all its colonies over to the pound sterling.

Being a colonial coin, they're not usually listed in British coin catalogues such as Spink, but there isn't really another country to obviously file them under either; cataloguers always have difficulty categorizing them. The Krause world coin catalogues file them all together under "British West Indies", though virtually all the 1820 coins were shipped off to Mauritius. Personally I file them under "British Colonies", which is the English translation of the Latin name that actually appears on the coins.

In my 2004 edition Krause, the 1820 1/8 dollar fetches double the price of the 1822 1/8 dollar. According to the NGC page for this coin, that's still a pretty good rule of thumb.