10-1/8x16.25" paper poster for May 17, 1970 concert that took place at the Electric Circus in Toronto, Ontario, Canada. The May 17th concert was headlined by country rock band The Flying Burrito Brothers, who were touring in support of the release of the band's second album - Burrito Deluxe - which was released in May 1970 by A&M Records. They were joined by Canadian rock group Buckstone Hardware, who had played an additional show at Electric Circus the night before. Psychedelic poster design by Frank Perold features cowboy on rearing horse. Poster has been rolled and is Exc.