The first time Led Zeppelin played San Francisco, they opened for Country Joe & the Fish; just three months later, they headlined four nights at Fillmore West and Winterland. BG170 was unlike any other Led Zeppelin poster or, in fact, any other poster in the BG series. Artist Randy Tuten had tired of seeing blimps in every Led Zeppelin advertisement, so he came up with the green avocado. Tuten liked it so much he "... wanted to do one a month that way- a series of crazy fruit posters."