Advertising Poster Byrds Electric Flag BB King Psychedelic. Original vintage advertising poster for The Byrds, Electric Flag and B.B. King concerts at Filmore Auditorium and Winterland Ballroom, San Francisco, the poster features a colourful psychedelic image of a mans face with flowers, American flag, person playing a guitar, eagle, and cockerel, stylised black and white lettering set over black background. Excellent condition. Country of issue: USA, designer: B. Maclean, size (cm): 53.5x36, year of printing: 1967.