Coin Encyclopedia
Search and identify coins from around the world — with country, denomination, metal, mint, history, and how to tell them apart.
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
1878 Twenty-Cent Piece (Proof)
The final-year proof-only issue of the US twenty-cent piece, struck for collectors just before Congress formally ended the short-lived denomination.
United States
1875-CC Twenty-Cent Piece
A Carson City strike of the short-lived US twenty-cent piece, valued both for its unusual denomination and its Wild West mint origin.
United States
Cuba 4 Pesos Gold Jose Marti
A small gold denomination from Cuba's early republican-era gold coinage, part of a 1915–1916 series (1 through 20 pesos) struck to circulate on par with US gold currency.
Latin American
1943 Copper Lincoln Cent
An extremely rare mint error where a handful of 1943 cents were struck on leftover bronze planchets instead of the wartime steel used that year, making it one of the most famous US coin errors.
Errors & Varieties
Cuba Peso 'Star' Silver (ABC Peso)
A silver dollar-sized Cuban peso featuring a prominent five-pointed star, popularly nicknamed the 'ABC Peso' and widely used interchangeably with the US silver dollar in the 1930s.
Latin American
Ecuador Sucre Silver
Ecuador's historic silver one-sucre coin, named after independence hero Antonio Jose de Sucre, circulated for decades before Ecuador's currency was eventually replaced by the US dollar.
Latin American
1970-S Washington Quarter Proof on 1941 Canadian Quarter
One of the most famous US mint errors: a 1970-S proof Washington quarter accidentally struck over a leftover silver 1941 Canadian quarter planchet at the San Francisco Mint.
Errors & Varieties
Trade Dollar
A heavier U.S. silver dollar struck specifically for trade with China and East Asia, later demonetized domestically and known for its distinctive weight-and-fineness inscription.
United States
1794 Flowing Hair Dollar
The very first silver dollar struck by the United States Mint, produced in extremely limited numbers and ranking among the most valuable American coins in existence.
United States
Spanish Colonial 8 Reales Ferdinand VII
A large silver 8 reales coin struck across Spain's American colonies bearing the portrait of King Ferdinand VII, widely circulated internationally and historically linked to the origin of the US dollar sign.
World
1861 Confederate Half Dollar
An extraordinarily rare Civil War-era coin struck briefly at the Confederate-controlled New Orleans mint, using a genuine CSA reverse die paired with an existing US half dollar obverse.
United States
Netherlands 5 Gulden Gold
A gold 5 gulden coin struck intermittently by the Kingdom of the Netherlands, first under King William I in the 1820s and later as a rare 1912 commemorative under Queen Wilhelmina.
European
Napoleon 20 Franc Gold Coin
A historic French gold coin first struck under Napoleon Bonaparte in 1803, later issued under successive French governments and long used as a benchmark gold coin across Europe.
European
Egyptian Qirsh (Muhammad Ali Era)
Silver-billon piastre struck in Egypt under Muhammad Ali Pasha in the name of the Ottoman Sultan, reflecting Egypt's growing autonomy within the empire.
Africa & Oceania
Testoon
The earliest English coin to carry a realistic royal portrait, introduced under Henry VII around 1487 as the forerunner of the shilling, later continued and debased under Henry VIII.
British
Quarter Guinea
A rarely issued small gold coin worth one-quarter of a guinea, struck only in 1718 under George I and again briefly in 1762 under George III.
British
French Napoleon 20 Francs Gold
France's standard 19th-century gold coin, first struck under Napoleon I and continued under later rulers and the Republic, giving rise to the enduring nickname "Napoleon" for any 20-franc gold coin.
European
Wood's Hibernia Halfpenny
A British copper coinage patented by William Wood for Ireland, controversially rejected there but widely circulated instead in colonial America, where large surplus shipments ended up in everyday trade.
United States
Italian Scudo (Papal States)
A large silver coin issued by the Papal States under successive popes, blending religious imagery with the temporal authority of the papacy.
European
Valentinian I Solidus
A high-purity gold solidus of Valentinian I, founder of the Valentinianic dynasty, reflecting the stable gold standard established under Constantine.
Ancient
Philip II of Macedon Gold Stater
A gold stater struck under Philip II of Macedon, father of Alexander the Great, widely circulated and imitated across the ancient Mediterranean and beyond.
Ancient
Edward VII Large Cent
Canada's large bronze cent struck 1902-1910 under King Edward VII, continuing the pre-1920 large cent format.
Canadian
Boeotia Federal Coinage Stater
A silver stater struck under the Boeotian League's shared coinage system, instantly recognizable by the distinctive figure-eight Boeotian shield on the obverse.
Ancient