Doubloons marked "2 S" are equivalent to four dollars in US gold coins and were traded in that manner. Small 1/2-escudo coins (similar to a US $1 gold piece) have no value marked on them but were worth a Spanish milled dollar in trade.
In Spain, doubloons were current up to the middle of the 19th century. Isabella II of Spain replaced an escudo-based coinage with decimal reales in 1859, and replaced the 6.77-gram doblón with a new heavier doblón worth 100 reales and weighing 8.3771 grams (0.268 troy ounces). The last Spanish doubloons (showing the denomination as 80 reales) were minted in 1849. After their independence, the former Spanish colonies of Mexico, Peru and Nueva Granada continued to mint doubloons.
Doubloons have also been minted in Portuguese colonies, where they went by the name dobrão, with the same meaning.
In Europe, the doubloon became the model for several other gold coins, including the French Louis d'or, the Italian doppia, the Swiss duplone, the Northern German pistole, and the PrussianFriedrich d'or.
In Raymond Chandler's novel The High Window, Phillip Marlowe is initially hired by Mrs. Murdock to locate a coin owned by her late husband, the "Brasher Doubloon", every owner of which has been murdered.
In the first Hardy Boys novel, The Tower Treasure (1927), Applegate's treasure is a chest of "gold doubloons". This theme reoccurred in a Disney serial, "The Hardy Boys and the Applegate Treasure" (part of The Mickey Mouse Club in 1955), in which "gold doubloons" are extensively featured.
In the online game Neopets, "dubloons" are rare coins found around the world and can be used on Krawk Island.
In the board game Puerto Rico, doubloons are used as currency.