The inca was a unit of currency in Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 between 1881 and 1882. The inca was issued in banknote form only and was subdivided in to 10 reales de inca or 100 centavos de inca. It was replaced by the Peruvian sol

Peruvian sol

The sol, was the currency of Peru between 1863 and 1985. It had the ISO 4217 currency code PEH. It was subdivided into 10 dineros or 100 centavos.-History:...

at a rate of 1 inca = 10 soles. The banknotes were withdrawn in 1882.

Banknotes

The inca appeared on two series of banknotes, one consisting of overprints on earlier notes, the other a regular issue. The overprinted denominations were 1 real de inca, surcharged on old 1 sol notes, 5 reales de inca, stamped on old 5 soles notes, and 100 centavos de inca (i.e., 1 inca), surcharged on old 100 soles notes. The regular issue of notes was in denomnations of 1, 5 and 100 incas. Some of the regular issue 5 and 10 inca notes were later surcharged with their value in soles.