Dublone Pubblico Deposited
A gold coin of Spain, introduced about the time of Peter I (1350-1368) and struck at Seville, Toledo, etc. The original type bore on one side a three-turreted castle, but this was followed by the portrait variety under Ferdinand and Isabella (1474-1516). The earlier variety is frequently known as the Doble Castellana and the other as the Dobla a la Cabeza.
The value of the Dobla, also called Doblon, was two Escudos or one eighth of the Onza. There were multiples, called Doblon de a Cuatro and Doblon de a Ocho, the latter was of course the same as the Onza; it was struck principally for Mexico and other Spanish colonies, and is commonly known as the Doubloon.
Another variety, the Dublone, was issued by Charles V during the Spanish occupation of the Low Countries.
By a royal decree of 1849 the metric system was introduced in Spain, and the money of account was made as follows: One Doblon de Isabel was equal to ten Escudos, or one hundred Reales, or five gold Piastres.
In the Italian coinage the term Dobla is generally applied to the double Ducato de Oro, such as was struck by the Emperor Charles V for Naples and Sicily, etc. See Chalmers, History of Currency in the British Colonies. 1893. (p. 395)
- Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)