Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
German Saxony Ducat
A high-purity gold trade coin struck for centuries by the rulers of Saxony, one of the most important German states before national unification.
European
1975 No S Proof Roosevelt Dime
One of the rarest and most valuable modern US coin errors: a 1975 proof dime struck without its San Francisco 'S' mintmark, with only a handful of examples known.
Errors & Varieties
Victoria Ten Cents (dime)
Canada's early silver ten-cent coin issued under Queen Victoria, struck intermittently from the introduction of decimal currency in 1858 through the end of her reign in 1901.
Canadian
Roman Republic Denarius
The workhorse silver coin of the Roman Republic, introduced during the Second Punic War and struck by a long line of moneyers with ever-changing, often political, designs.
Ancient
1796 Draped Bust Quarter
The very first quarter dollar struck by the United States Mint, a one-year type coin with a tiny mintage that is treasured by collectors of early American silver.
United States
Venetian Gold Ducat
First struck in 1284, the Venetian gold ducat became medieval Europe's most trusted trade coin, prized for centuries for its unwavering weight and purity.
European
Chinese Knife Money (Ming Dao)
An ancient Chinese bronze currency cast in the shape of a knife, bearing a character often read as "Ming" on its blade, used mainly by the northern state of Yan before round coinage prevailed.
Asian
1794 Flowing Hair Half Dime
One of the very first silver coins struck for circulation by the United States Mint, bearing the Flowing Hair Liberty design and a small eagle reverse.
United States
Crown of the Double Rose
A gold coin introduced by Henry VIII in 1526 as part of his coinage reform, named for the crowned Tudor double rose on its reverse.
British
Athenian Owl Dekadrachm
An extremely rare large-format silver coin of classical Athens, struck in only a handful of surviving examples and prized as one of the great rarities of ancient Greek numismatics.
Ancient
German Hamburg Ducat
A small, exceptionally high-purity gold trade coin struck for centuries by the free city of Hamburg, prized for its consistent fineness and long production history.
European
Islamic Gold Dinar (Umayyad)
The first purely epigraphic Islamic gold coin, introduced by Caliph Abd al-Malik around 696 AD, replacing figural Byzantine-style imagery with Quranic inscriptions.
Ancient
Japanese Trade Dollar
A short-lived Meiji-era silver coin struck to the same weight and fineness as the Mexican and U.S. Trade Dollars so Japan could compete in East Asian commerce.
Asian
Presidential Dollar Series
A circulating dollar coin series honoring US presidents in order of service, featuring edge-lettered mottos and a shared Statue of Liberty reverse across every release.
United States
1918/7-D Buffalo Nickel
One of the most famous overdate errors in United States coinage, showing 1918 struck over an earlier 1917 date on a Buffalo nickel die reused at the Denver Mint.
Errors & Varieties
Draped Bust Large Cent
An early American copper cent showing a classically draped Liberty, based on a Gilbert Stuart portrait, minted at the dawn of United States coinage.
United States
Sassanian Silver Drachm
The standard silver coin of the Sasanian Persian Empire, featuring an elaborately crowned king's portrait and a Zoroastrian fire altar with attendants, struck for over four centuries.
Ancient
Presidential Dollar - John Adams
The second coin in the U.S. Presidential Dollar series, honoring John Adams, also affected by a notable doubled and missing edge-lettering error alongside the Washington issue.
United States
1953 Coronation Voyageur Dollar
The first Canadian silver dollar of Queen Elizabeth II's reign, issued in her coronation year, featuring the classic Voyageur canoe reverse and known for two collectible obverse varieties.
Canadian
1794 Flowing Hair Half Dollar
The first half dollar ever struck by the United States Mint, produced in tiny numbers and ranking among the most desirable early American silver coins.
United States
Hadrian Travel Series Denarius
A celebrated series of silver denarii issued late in Hadrian's reign, personifying the many provinces he famously toured throughout the Roman Empire.
Ancient
Tiberius Tribute Penny Denarius
The famous silver denarius of Emperor Tiberius traditionally identified as the biblical 'Tribute Penny' from the New Testament's 'Render unto Caesar' episode.
Ancient
1804 Draped Bust Silver Dollar
Extraordinarily rare U.S. dollar known as "The King of American Coins," actually struck decades after its 1804 date for diplomatic gift sets and later collectors, with only 15 known examples.
United States
Magnentius Double Centenionalis
A large bronze coin of the usurper Magnentius featuring one of the earliest large Christian Chi-Rho symbols on Roman coinage.
Ancient