"Black Pearl - 1969 US":

Black Pearl was a San-Francisco-based band that existed from the late 1960s to the early 1970s. They released two albums, Black Pearl (1969) and Black Pearl - Live! (1970).
Black Pearl was composed of Bernie "B.B" Fieldings (vocals), Bruce Benson (guitar), Oak O'Connor (drums), Geoffrey Morris (guitar), Tom Mulcahy (guitar) and Jerry Causi (bass).
As noted by one reviewer, "Black Pearl crank out some hard rockin' psych-rock music with the most ferocious drumbeats you've heard in a while."
The band's three guitar lineup was considered to be both unique and powerful, being a format also found in contemporaries Moby Grape and Buffalo Springfield.

 -by dj fanis: here