You haven't given enough information to fully identify the coin, but the words "quinto centenario" mean "quincentenary" (or "500th anniversary") in Spanish, so it is presumably a coin issued by a Spanish-speaking country in commemoration of the 500th anniversary of some historical event.
12.00
It would depend on the coin. Centenario coins were made for more than just one country (Mexico, Uruguay, etc) with more than just one design on them.
It is a gold coin named Centenario, worth USD$1,244.
The gold coin you are talking about is a "Centenario" and it is worth about $1,200 dollars (or 785 Euros).
No. The largest denomination is the centenario, a 50 pesos coin with 1.2057 oz of pure gold. It costs around US$2100 (Jan 2012)
El Centenario's population is 4,696.
El Centenario was created in 1965.
Villa Centenario's population is 49,737.
Estadio Centenario was created in 1930.
Terry Centenario from the family surname, which is Terry.
The capacity of Estadio Centenario at Montevideo in Uruguay is 65,235.
Ron Zacapa Centenario was created in 1976.