Hello friends!
Although research on this finding and is very abanzada, I can bring some clarity and historical data Regiment No. 10, and provide conclusions that ended in territory of USA..........

It is true is a button belonging to the Spanish Line Infantry No. 10 of the City of Cordoba, manufactured between 1841 to 1846 ... but.
Due to the great crisis in which Spain found itself after losing all its territories outside Europe, there was not enough money to make uniform buttons and continued to use civil war practically till 1936.
Do not forget that your current Nacion USA forged in part by invading or buy territories in Spain (California, New Mexico, Texas, also the island of Cuba and the Philippines ... that later lost.) .... ie facing our two Empires They were exposed for several wars during the period of use of this button, and may be the memory of a soldier who belonged to one of these wars.
Córdoba Infantry Regiment No. 10 is eminently maritime origin and newly created in 1566 sailed to Naples and its first field master and founder D. Lope de Figueroa, was his first name to "Tercio de Figueroa", for a year later changed to "Third of the Ocean Sea Fleet." In the year 1571 is known as "Third of the Catholic League" and then in 1580, called "Third of the Navy." After his victory in the battle of the Third in 1586, is given the name "Third of the Third."
In 1603 was renamed "Old Regiment of the Royal Navy of the Ocean Sea", until in 1664 after numerous personnel recruiting in the city of Cordoba, became known as "Third Provincial de Córdoba". A few years later retrieves the name "Old Regiment of the Royal Navy of the Ocean Sea", until in 1700 it changed to 'Third 1 of the Navy. "
In the year 1704 is known as the "Regiment of ships n º 1", until in 1707 he called the "Regiment of ships n º 23" and in 1718 called "Infantry Regiment Cordoba n º 6", changing its numbering No. 10 in 1741 and No. 9 in 1769.
Loses its name in 1810 by "Provisional Regiment No. 4", recovering again in 1811 by "Córdoba Infantry Regiment No. 4" and change again in 1815 by "Córdoba Infantry Regiment No. 12." With the loss of the organization of the Regiments in 1823 became known as "Battalion n º 23" and "Battalion No. 24" in 1825 and quickly retrieve the foot of the Regiment as "Provisional Regiment of Line # 9."
In 1826 called "Infantry Regiment Almansa No. 9" and two years later in 1828 is changed to "Infantry Regiment Córdoba No. 9" and finally in 1833 taking the name "Infantry Regiment Córdoba No. 10."
Is dissolved in 1854 and again organized the same year with the name "Cordova Infantry Regiment No. 10", with which he remained until 1931.
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And these are the best known battles that the regiment acted 10:
"Maritime Campaign" (1571-1630), Battle of Lepanto, Agra, Islas Third, Armada, Mamora beach taking actions in the Windward Islands.
"American War" (1634-1639); Defeats Pernambuco and Paraiba, defense of the bay of Todos Santos and combat-Camaraca.
"War with France" (1639-1643); Defense Canet, assault Rives-Altes and aid of Rosas.
"War of Italy" (1646-1650); Victoria Argentazo and Giglio, Orbitello relief, making Naples and Piombino, Oneglia conquest.
"War in Catalonia (1650-1655); Occupation Miraved, making Solsona.
"War with Portugal" (1657-1665); Making Olivenza defense Badajoz, site Yepes, reconquest of Arronches, Battle of Estremoz and Villaviciosa.
"War of Succession" (1707-1714), Battle of Almansa, occupation of Alcoy, making Denia, Gudiña battle, Monte-Torrero, Brihuega and Villaviciosa.
"War in Italy" (1718-1747), Conquest of Messina, occupancy and Coni Demont, Battle of Madonna del Olmo, Basignana, Plasencia, occupation of Tortona, and fighting CASTALA-Nuovo and Chin.
"Maritime Campaign" (1753-1792); Defense Ceuta, Conquest Santa Catalina Island and Sacramento, site of Gibraltar, Oran defense.
"War of Roussillon" (1793-1794); making Bellegarde, Thuir battle, Canoes.
"War of Independence (1808-1812), Paso del Guadalquivir, Batalla de Bailen, Somosierra defense, Battle of Medellín and Ocaña Almonacid, fighting and blocking Castellá Barcelona.
"First Carlist War" (1833-1838); Shares Arcos, Nazar, museums and Mendigorría. Miravalles actions, Villaró, Mendigorría battle, Huesca, Barbastro and Body Fat. Linares actions, Arcos de las Cantera, Alcora. Castil comatose de la Peña, Morella, Uxó and Maella.
"Political Events" (1843-1849), Siege of Barcelona, Suria actions, alcotan, Sabadesa, San Pedro de Torrelló, Angles Mas de Vilar. Oriols fighting, Albana, Planas and Espontella.
"War of Africa" (1859-1860); Defense Ceuta, Battle of Castillejos, actions Azmir River, Battle of Tetuan and Wad-Ras.
"Civil War" (1872-1876); Shares of Sierra de Bernal, Villafría, Miranda de Ebro, Yesa Gandesa Lácar fighting, Sierra de Galceran, Montejurra and Estella.
"Guerra de Cuba" (1895-1898); Shares Bayagua, Arrochar, Mines, Rio Grande, Piñán, Barbecue defense.
Campaigns in Africa "(1913-1924), Rincon de Medik Actions, Izumate, Cudia-Xeruta.
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And now my historical conclusions about this finding:
Is a Spanish button Infantry Regiment No. 10, belonged to a soldier who attended the Cuba war between Spain and USA (in America called Spanish-American War.)
The Button was transported to USA for some soldiers as souvenirs of the war.
This is based on the regiment No. 10, fought in the war in Cuba and is highlighted in red a little higher and was the only war in which this regiment participated against the U.S.A.
In this Spanish forum shows a button that looks like:
http://www.google.es/imgres?imgurl=...1W1PBEA_es&tbm=isch&ei=2yHyTdCvN8O1tAaw1qmIBw
Some similar Buttons hunt for me:
https://picasaweb.google.com/terrac...key=Gv1sRgCPar4Kq5v_b8nwE#5616610782272027986
Thank to God our two nations are now friends and it will be much more in the coming years .... but it was not always so.
Sorry for my bad English.
H