The "old" peso was used as currency in Chile between 1917 to 1959, when the escudo (CLE) came into use. The current (or new) Chilean peso was re-established on September 29, 1975, replacing the escudo at an exchange of 1:1000.
The Chilean people also refer to their currency by "luka" when refering to the 1,000 peso note, "quina" for the 500 peso coin,and "gamba" for the 100 peso coin.