There are, at least, three bands named Quintessence: 1) A 60s/70s British psychedelic rock band. 2) A Finnish nu-soul / jazz / funk band. 3) A French black metal band.
These are videos from concerts where Quintessence played, so they may be of other bands that played the concert as well.
Atomic Sunrise 1970 Mar 9 - 15, 1970 London, England, United Kingdom Embedded by Concert Archives 3
Soft Machine / The Deviants / Eclection / Al Stewart / Quintessence / Edgar Broughton Band Sep 20, 1969 London, England, United Kingdom Embedded by Brian Lr
