Advertising Poster Blue Cheer Psychedelic Superline Dandelion Owl. Original vintage advertising poster for a music concert Blue Cheer Superline Dandelion Light Diogenes Nov 3 Lantern Works Nov 4 presented by The Family Dog, the poster features a psychedelic illustration of a nude lady atop a white owl reaching for a planet set over blue gradual background. Ticket sale information below the image. Excellent condition. Country of issue: USA, designer: Unknown, size (cm): 51x35, year of printing: 1967.