A big poster advertising two concerts, on BG250 Singer reversed his triptych design to flank the panel of information with mirror-image pictoral tablets. Chuck Berry and Eric Burdon, two huge but different draws, performed at the Fillmore West on consecutive weekends. This poster was reminiscent of BG229 in its use of rock formations to form a face, and the lettering on BG250 mimicked the birds in flight.
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.