This lot features an original first printing of the 1966 “Blues Rock Bash” concert poster from San Francisco’s Fillmore Auditorium, produced during the formative years of the Fillmore’s legendary psychedelic rock era. The poster represents the distinctive graphic art and concert culture that emerged from San Francisco in the mid-1960s and documents a pivotal period in American rock music history. This example is presented in mint condition and professionally framed, preserving an original piece of 1966 Fillmore and San Francisco music memorabilia.