Effective period / Period of releases: 1973 - 2000

Members: Alfonso Vergara, Mario Millar, Nelson Olguín, Orlando Aranda, Robinson Campos, Rodolfo Irribarra, Jorge Soto (2), Sergio Del Río (2), James Robledo, Rudy Ferrada, Andrés Retamal, Poncho Vergara

Influential chilean hard rock, heavy rock, classic rock & early-metal band aus Santiago, founded 1972 in this city by Alfonso "Poncho" Vergara (bass, vocals), Sergio Del Río (2) (ex-Aguaturbia) (guitar) and the drummer Rodolfo Irribarra.

Members are / were:

- Alfonso "Poncho" Vergara: bass and lead vocals (1972 – 2004)
- Sergio del Río: guitar (1972 – 1973)
- Rodolfo Irribarra: drums (1972 – 1973)
- Orlando Aranda: guitar and vocals (1975 – 1980)
- Nelson Olguín: drums (1975 – 1980)
- Jorge Soto: keyboards (1977 – 1980)
- Mario Millar: lead vocals (1977 – 1980)
- Robinson Campos: drums (1982 – 1993)
- Jorge Fritz: keyboards (1984 – ?)
- Rudy Ferrada: drums (1994 – ?)
- Mauricio Padilla: guitar (1994 – ?)
- Luis Vergara: guitar (1994 – ?)