The writer of folk-rock standards "Do You Believe in Magic" and "Summer in the City" with his band The Lovin' Spoonful, John Sebastion appeared at the Fillmore West with former Electric Flag member and frequent Jimi Hendrix collaborator, Buddy Miles.
The handbill was only printed once before the concert. It presents a calendar of upcoming Bill Graham events on the reverse and measures 4 5/8" x 7".
There were also some pre-concert postcard mailers printed that were conjoined with the BG237 image (see BG237/238). They measure 7" x 9 1/4".
During his Fillmore era, from 1969-1971, Singer created more posters for Graham than any other artist. Singer's posters are notable for his use of collage, incorporating thousands of images clipped from magazines spanning several decades. He developed a format that included a stunning variety of lettering styles, applying them in close relation to the theme or subject of a poster.