Czech rock group from Prague
Formed 1964

Members:
Roman Mašek - Vocals
Michal Ďurčo - Guitar
Martin Ježek - Guitar
Jindřich Pavlišta - Bass, Vocals
Ladislav Doležal - Drums

Former/past members:

Vocals :
Pavel Čapek
Jiří Kanička Stach
Pavel Roth
Zuzana Křemenová
Pavel Bureš
Viktor Sodoma
Petr Kubec (and Guitar)
Marie Špačková
Jana Robbová
Oldřich Bureš
Rudy Finta
Milan Pavýza
Tommy Wheeler

Guitar :
Jiří Kadlec
Jan Hudeček
Václav Skřivan
Štěpán Alexa
Rudolf Rožďalovský
Jaroslav Pracna
Slávek Brada
Antonín Valíček
Aleš Dvořák
Jindra Matějka
Vitalij Grapenjuk
Petr Angus Vnuk

Bass :
Antonín König (and Drums)

Keyboards :
Jiří Cendra
Miloš Kalinovský
Richard Kliment

Drums :
Jaroslav Kadlec
Jan Vošahlík
Václav Rambousek
Ota Hlinka
Karel Jenčík
Miroslav Nedvěd
Zdeněk Jung
Jiří Faber

Assorted Instrumentation :
Jiří Janda - Saxophone, Flute
Palec - Conga