4.5x14" double postcard features both Bill Graham concert postcards BG-105 and BG-106 and was distributed as such to promote Feb., 1968 concerts. BG-105 was used to promote the Feb. 1-4 concerts at the Fillmore Auditorium and the Feb. 2-3 concerts at Winterland in San Francisco, CA that featured The Jimi Hendrix Experience as well as John Mayall and The Bluesbreakers. Art by Rick Griffin features classic winged eyeball holding a skull. BG-106 was used to promote the Feb. 8-10 concerts at the Fillmore Auditorium in San Francisco, CA that featured John Mayall and The Bluesbreakers, Arlo Guthrie and Loading Zone. Art by Mouse Studios features tiny Egyptian eye at bottom. Horizontal fold at center between the two postcards and minor corner tip wear. Fine/VF.