C. Kraay, Archaic and Classical Greek Coins, University of California Press, Berkeley, 1976. As of 2013, examples include BitCoin and LiteCoin, among others. As a result of the increase in the value of copper, the United States greatly reduced the amount of copper in each penny.
The "Silver Masonic Illuminati Coin Freemasons Mystery Strange Old Square and Compass" would be an excellent addition to collections of other Masonic or occult artifacts, appealing to collectors of such subjects.
