Silver Trade Dollars
Rewind back to the 1800's when trade was starting to take place between the U.S., Britain and countries in the East. It became necessary to make silver dollars coins or trade dollars that would be used specifically for trading between two countries. Britain, the United States, Japan and China started to make silver trade dollars to be used in exchanged for goods from each respective country.
Many of these coins still exist today and can be bought at auctions or through coin dealers throughout the world. Visit this link for a list of Trade Dollars for Sale.