Copper Panic of 1789

A coin is a small object, usually round and flat, used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate trade. They are most often issued by a government. Coins often have images, numerals, or text on them. The faces of coins or medals are sometimes called the obverse and the reverse, referring to the front and back sides, respectively. The obverse of a coin is commonly called heads, because it often depicts the head of a prominent person, and the reverse is known as tails.

In economics, Gresham's law is a monetary principle stating that "bad money drives out good". For example, if there are two forms of commodity money in circulation, which are accepted by law as having similar face value, the more valuable commodity will gradually disappear from circulation.

Legal tender is a form of money that courts of law are required to recognize as satisfactory payment for any monetary debt. Each jurisdiction determines what is legal tender, but essentially it is anything which when offered ("tendered") in payment of a debt extinguishes the debt. There is no obligation on the creditor to accept the tendered payment, but the act of tendering the payment in legal tender discharges the debt.

The Korean Won or Korean Empire won, was the official currency of the Korean Empire between 1900 and 1910. It was subdivided into 100 jeon.

The franc, also commonly distinguished as the French franc (FF), was a currency of France. Between 1360 and 1641, it was the name of coins worth 1 livre tournois and it remained in common parlance as a term for this amount of money. It was reintroduced in 1795. After two centuries of inflation, it was redenominated in 1960, with each new franc (NF) being worth 100 old francs. The NF designation was continued for a few years before the currency returned to being simply the franc. Many French residents, though, continued to quote prices of especially expensive items in terms of the old franc, up to and even after the introduction of the euro in 2002. The French franc was a commonly held international reserve currency of reference in the 19th and 20th centuries. Between 1998 and 2002, the conversion of francs to euros was carried out at a rate of 6.55957 francs to 1 euro.

A debasement of coinage is the practice of lowering the intrinsic value of coins, especially when used in connection with commodity money, such as gold or silver coins, while continuing to circulate it at face value. A coin is said to be debased if the quantity of gold, silver, copper or nickel in the coin is reduced.

The pound was the currency of Scotland prior to the 1707 Treaty of Union between the Kingdom of Scotland and the Kingdom of England, which created the Kingdom of Great Britain. It was introduced by David I, in the 12th century, on the Carolingian monetary system of a pound divided into 20 shillings, each of 12 pence. The Scottish currency was later devalued relative to sterling by debasement of its coinage. By the time of James III, one pound Scots was valued at five shillings sterling.

The Netherlands Indies guilder was the unit of account of the Dutch East Indies from 1602 under the United East India Company, following Dutch practice first adopted in the 15th century. A variety of Dutch, Spanish and Asian coins were in official and common usage. After the collapse of the VOC at the end of the 18th century, control of the islands reverted to the Dutch government, which issued silver 'Netherlands Indies' guilder and fractional silver and copper coins until Indonesian independence in 1945.

Canada has an extensive history with regard to its currencies. Prior to European contact, indigenous peoples in Canada used items such as wampum and furs for trading purposes, which continued when trade with Europeans began. During the period of French colonization, coins were introduced, as well as one of the first examples of paper currency by a western government. During the period of British colonization, additional coinage was introduced, as well as banknotes. The Canadian colonies gradually moved away from the British pound and adopted currencies linked to the United States dollar. With Confederation in 1867, the Canadian dollar was established. By the mid-20th century, the Bank of Canada was the sole issuer of paper currency, and banks ceased to issue banknotes.

The United States trade dollar was a dollar coin minted by the United States Mint to compete with other large silver trade coins that were already popular in East Asia. The idea first came about in the 1860s, when the price of silver began to decline due to increased mining in the western United States. A bill providing in part for the issuance of the trade dollar was eventually put before Congress, where it was approved, and signed into law as the Coinage Act of 1873. The act made trade dollars legal tender up to five dollars. A number of designs were considered for the trade dollar, and an obverse and reverse created by William Barber were selected.

Money is any item or verifiable record that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular country or socio-economic context. The primary functions which distinguish money are: medium of exchange, a unit of account, a store of value and sometimes, a standard of deferred payment.

This article provides an outline of the currency of Spanish America from Spanish colonization in the 15th century until Spanish American independencies in the 19th. This great realm was divided into the Viceroyalty of New Spain, which came to include all Spanish territory north of Panama, the West Indies, Venezuela, and the Philippines, and the Viceroyalty of Peru, which included Panama and all Spanish territory in South America except Venezuela. The monetary system of Spanish America, originally identical to that of Spain, soon diverged and took on a distinctive character of its own, which it passed on to the independent nations that followed after.

The British shilling, abbreviated "1s" or "1/-", was a unit of currency and a denomination of sterling coinage worth 1⁄20 of one pound, or twelve pence. It was first minted in the reign of Henry VII as the testoon, and became known as the shilling, from the Old English scilling, sometime in the mid-16th century. It circulated until 1990. The word bob was sometimes used for a monetary value of several shillings, e.g. "ten-bob note". Following decimalisation on 15 February 1971 the coin had a value of five new pence, and a new coin of the same value but labelled as "five new pence" or "five pence" was minted with the same size as the shilling until 1990, after which the shilling no longer remained legal tender. It was made from silver from its introduction in or around 1503 until 1946, and thereafter in cupronickel.

The United States dollar is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color.

A gold coin is a coin that is made mostly or entirely of gold. Most gold coins minted since 1800 are 90–92% gold (22‑karat), while most of today's gold bullion coins are pure gold, such as the Britannia, Canadian Maple Leaf, and American Buffalo. Alloyed gold coins, like the American Gold Eagle and South African Krugerrand, are typically 91.7% gold by weight, with the remainder being silver and copper.

Coinage of the Ptolemaic kingdom was struck in Phoenician weight, also known as Ptolemaic weight which was the weight of a Ptolemaic tetradrachm. This standard, which was not used elsewhere in the Hellenistic world, was smaller than the dominant Attic weight which was the weight of standard Hellenistic tetradrachm. Consequentially, Ptolemaic coins are smaller than other Hellenistic coinage. In terms of art, the coins, which were made of silver, followed the example set by contemporary Greek currencies, with dynastic figures being typically portrayed. The Ptolemaic coin making process often resulted in a central depression, similar to what can be found on Seleucid coinage.

Daqian are large-denomination cash coins produced in the Qing dynasty starting from 1853 until 1890. Large denomination cash coins were previously used in earlier Chinese dynasties and had faced similar issues as 19th-century Daqian. The term referred to cash coins with a denomination of 4 wén or higher.