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((Short description|Letter, symbol or an inscription on a coin indicating the mint where the coin was produced))
A '''mint mark''' is a letter, symbol or an inscription on a [[coin]] indicating the [[mint (coin)|mint]] where the coin was produced. It should not be confused with a [[mintmaster mark]] which is the mark of the [[mintmaster]].

==History==
Mint marks were first developed to locate a problem. If a coin was underweight, or overweight, the mint mark would immediately tell where the coin was minted, and the problem could be located and fixed. Another problem which could occur would be a dishonest mint official [[debasement|debasing]] the coin, or putting less [[precious metal]] in the coin than specified. The first mint marks, called "Magistrate Marks" were developed by the [[Ancient Greece|Greeks]], and named the [[Magistrate]] in charge of producing that coin. Debasing a coin, or otherwise tampering with it, was a very serious crime, often punishable by death in many civilizations. For example, in 1649, the directors of the [[Spain|Spanish]] colonial American Mint at [[Potosí|Potosi]], in what is today [[Bolivia]], were condemned to death for seriously debasing the coinage. The initials of the [[Metallurgical assay|assayer]] as well as the mint mark were immediate identifiers when the coins were inspected.

In some cases the symbols found in the field of ancient Greek coins indicated mints, not magistrates.  Mints in territories conquered by [[Alexander the Great]] struck coins with the types he used in [[Macedonia (ancient kingdom)|Macedon]] but marked with a local symbol.<ref>Greek Coins and Their Values, H. A. Seaby, Kings of Macedon coin 539</ref> For example, Rhodes struck coins with Alexander's types marked with a rose, a local symbol previously used on its own coins.<ref>Historia Numorum, Barcay Head, introduction page lix</ref>

A reform of [[Diocletian]] made mint marks a regular feature of ancient Roman coinage.  These mint marks were placed at the bottom of the reverse of the coin and contained three parts.   The first part indicates that this was a coin with either SM for Sacra Moneta, M for Moneta, or P for Pecurnia.  The second part was an abbreviation of the name of the mint such as ROM for Rome or LON for London.  The final part indicated the workshop within the mint.<ref>Roman Coins and Their Values, David Sear page 47</ref>  The reform of [[Anastasius I Dicorus|Anastasius]], which is the traditional dividing point between the  coinage of the Roman and the Later Roman (a.k.a. Byzantine) empires, replaced the mint marks on gold coins by the inscription CONOB, meaning the pure standard of Constantinople, which was used by a variety of mints.  Mint marks continued on copper coinage until the second half of the seventh century, however.<ref>Byzantine Coins, P. D. Whiting, page 60</ref>

[[Image:PrivyMark.jpg|thumb|Mint mark and privy marks on [[Cochinchina Piastre|French Cochinchina 20 Cents 1879]], [[Paris Mint]] ]]
Mint names began to appear on French coins under Pepin and became mandatory under [[Charlemagne]].<ref>Coins in History, John Porteous, page 54</ref>  In 1389, [[Charles IV of France|Charles IV]] adopted a system called Secret Points.  This scheme placed a dot under the first letter of the legend on coins of Crémieu, under the second letter for Romans, up to the twenty-second letter for Bourges.<ref>The Silver Coins of Medieval France, James Roberts, page 202</ref>  In the fifteenth century letters or symbols placed at the end of the legend indicating the mint were used in addition to Secret Points.<ref>The Silver Coins of Medieval France, James Roberts, page 203</ref>  In 1540, [[Francis I of France|Francis I]] discontinued Secret Points in favor of a system of letters; A for Paris, B for Rouen, …, Z for Lyon; in the field.<ref>The Silver Coins of Medieval France, James Roberts, page 204</ref> He also made it the rule for mint-masters to place their personal marks on coins, as they had done with increasing frequency since the coinage of [[Louis XI of France|Louis XI]].  This was one of the few royal practices continued by the Republic of France.<ref>Coins in History, John Porteous, page 164</ref>   The mint letters continued until 1898 (briefly revived in 1914 and from 1942 to 1958) and the mint-masters marks, supplemented by the mark of the Chief Engraver, are still used.<ref>Standard Catalog of World Coins by Krause Publications</ref>

Some Medieval English coins used mint names .<ref>Coins in History, John Porteous, page 68</ref>  When [[William III of England|William III]] retired hammered coinage, branch mints which helped strike machine made coins to replace it put their initials below his bust.<ref>Coins in History, John Porteous, page 214</ref>   The Royal Mint established branches to coin [[Sovereign (British coin)|sovereigns]] near the sources of gold.  These issues show the initials of Sydney, Melbourne, Victoria, and Perth Australia as well as Canada, South Africa, and India.<ref>Historic Gold Coins of the World, Burton Hobson, pages 129 and 132</ref>  The privately owned [[Soho Mint]] obtained a contract to strike royal copper coins with steam presses and put its name on these coins and on coins it minted for other countries.  When it closed, Ralph Heaton acquired its equipment, founded the [[Birmingham Mint]], and put his H mint mark on coins of Canada, among others.

[[File:Philip V Coin silver, 8 Reales Mexico.jpg|300px|left|thumb|Spanish Milled Dollar with Mexico City Mint Mark.]]
The Spanish Empire introduced mint marks to the New World when they authorized Mexico City to open a mint on 11 May 1535.  The Spanish Empire established mints throughout its American territories, each with their own mint mark.  After its revolution, Mexico continued to use its colonial Mo monogram mint mark shown on either side of the date in the [[Spanish dollar|Spanish Milled Dollar]].  The United States of America established mints in Charlotte, North Carolina and Dahlonega, Georgia in 1838 after the  [[Georgia Gold Rush]] and put its first mint marks on the gold coins struck there.<ref>A Guide Book of United States Coins, R. S. Yeoman</ref>  Like other countries, the United States has since placed mint marks not only on its own coins but also those of its territories, such as the Philippines, and other countries for which it has contracts to strike coins, such as Fiji.

==Mint marks in numismatics==
In the 19th century, [[numismatists]] (coin collectors) did not generally collect coins according to mint mark; rather, they attempted to obtain date sets of coins. A turnaround began after 1893, when [[A. G. Heaton]]'s "A Treatise on Coinage of the United States Branch Mints" was published. Heaton cited example after example of mint-marked coins that were much scarcer than [[Philadelphia]] products and that should bring high premiums. When the [[United States]] abandoned [[silver]] coinage in 1964, mint marks were removed from the new [[copper-nickel]] coins in the belief that it would reduce the removal of coins from circulation by collectors. The silver coins quickly disappeared from circulation, and it was feared that if collectors saved too many of the new coins, there would be a serious shortage of coinage. Mint marks were returned to United States coins in 1968.

==United States Mint Marks==
((More citations needed|date=October 2020|reason=The entire first paragraph and many other parts of this section are largely unreferenced|section))
[[File:1872 US 'Liberty Seated' Silver Dollar, Obverse, Carson City Mint.jpg|thumb|[[Carson City Mint]] 1872 "Liberty Seated" silver dollar reverse, bearing the mint's CC mint mark just beneath the eagle.]]
The current mint marks on [[United States coinage]]  are P, D, S, and W for the 4 currently operating US Mints.  The letter P is used for the [[Philadelphia Mint]], D for the [[Denver Mint]], S for the [[San Francisco Mint]], and W for the [[West Point Mint]].  Over time there have been 9 official United States Mints.  The first US Mint was in Philadelphia which began coin production with large cents and the half cents of pure copper in early 1793. Other US Mints, prior to the twentieth century, were considered "branch mints".  United States mint marks were  originally used to distinguish coins not made in Philadelphia.  The 8 mint marks used to distinguish coins not minted in Philadelphia (in the chronological order of their first coinage) are: D for the [[Dahlonega Mint]] (production of coins started on February 12, 1838), C for the [[Charlotte Mint]] (March 27, 1838), O for the [[New Orleans Mint]] (May 8, 1838), S for the [[San Francisco Mint]] (April 3, 1854), CC for the [[Carson City Mint]] (February 11, 1870), D again (Dahlonega had closed in 1861 never to reopen) now for the [[Denver Mint]] (March 12, 1906),  M for [[Manila Mint]] (July 15, 1920) (where an official US Mint began with the coinage of a one centavo coin on July 15, 1920) and lastly a W for the [[West Point Mint]]. The West Point Mint began coin production on July 29, 1974 to ease the shortage of quarters and other minor coinage and bore no mint mark. Thus West Point coins could not be distinguished from those made at the Philadelphia Mint. The West Point mint mark, "W", was first used on the $10 gold coins commemorating the 1984 Olympic games in Los Angeles.  Most Philadelphia Mint coins from earlier than 1980 were unmarked with the notable exceptions being wartime nickels (1942-1945), and [[Susan B. Anthony dollar]]s (1979-1999).  The P mint mark was first used on the Susan B. Anthony Dollars starting 1979.  From 1980 until 2017, the [[Lincoln cent]] was the only coin that did not always have a mint mark, using a "D" when struck in Denver but lacking a "P" when ostensibly struck at the Philadelphia mint. This practice allowed the additional minting of coins at the San Francisco mint ("S") and West Point mint ("W") without the use of their respective mint marks to address circulating coinage needs without the concern of creating scarce varieties that would be plucked from circulation by collectors.  In the single year of 2017 the Philadelphia "P" was added to the Lincoln cent to celebrate 225 years of Philadelphia Mint service.<ref>((cite web|title=It's really true: Cents struck at Philadelphia Mint in 2017 bear P Mint mark|url=http://www.coinworld.com/news/us-coins/2017/01/p-mint-mark-added-to-lincoln-cent-for-first-time.all.html|publisher=Coin World|access-date=29 May 2017))</ref> Generally 21st century coins with an "S" or "W" do not circulate, being mostly produced as [[bullion]], [[commemorative coin|commemorative]], [[proof coinage]] or other "collector coinage" sold by the US Mint to either authorized bullion wholesalers or directly to collectors. There was also an exception, the 2019-W quarter made for circulation. Only 2 million were made for each design. The West Point Mint continues to make W quarters intended for circulation. This is called "The Great American Coin Hunt". The S mintmark were also used for circulated coins until 1980.

==Other countries==
Although the US and several other countries use the initial letter of the city for its mint marks, this practice is not universal.  For instance, Germany used A for Berlin, D for Munich, E for Muldenhutten, F for Stuttgart, G for Karlsruhe and J for Hamburg.  When Spain adopted decimal coinage in 1848, it used stars with different numbers of points as mint marks. Madrid used six pointed stars, Barcelona used eight pointed stars, and so on.  After the revolution of 1868, small dates were placed in these stars.<ref>Standard Catalog of World Coins, C. Krause and C Michler, Spain</ref>  The small dates indicated the year the coin was struck, as opposed to the large date on the coin which was the year it was authorized.<ref>The Coin Atlas, Crib, Cook, and Carradice, p. 58</ref>

Many mints of the world commonly use a [[Privy mark]], which is a symbol unique to each mint. The [[Royal Canadian Mint]] commonly uses a [[maple leaf]] privy mark.   Segovia, Spain used an aqueduct, a local landmark, before it switched over to the star system in 1868.  The private mint of the French Coinage Society Poissy Branch used a thunderbolt mint mark on coins of France, its colonies, Romania and other countries.<ref>Standard Catalog of World Coins, C. Krause and C Michler, Spain, France, French Indo-China and Romania</ref> [[Image:Muntteken muntmeesterteken.png|thumb|[[Privy mark]] (left) and mint mark on a Dutch coin. The mint mark is that of the mint of Utrecht. Since 1830 (with an interruption in 1941-1945) this mark is pressed on all Dutch coins.]]

Many [[Islamic]] coins bear an inscription telling which mint produced the coin. This inscription is often the name of the city where the coin was minted spelled out in [[Arabic]] script.

Several [[euro coins]] have mint marks of their respective Mint. See [[Identifying marks on euro coins]] for more information.

==See also==
*[[Privy mark]]

== References ==
((Reflist))

==External links==
* [http://www.goldsovereigns.co.uk/mintsandmintmarks.html Mint marks on British gold Sovereigns]

((Authority control))

[[Category:Numismatic terminology]]
[[Category:Inscriptions by type]]
[[Category:Production of coins]]

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