Original Vintage 1966 Winterland Fillmore Blues - Rock Bash II Badge

Original 1966 vintage pinback / badge advertising "Blues-Rock Bash II", a series of concerts at the Winterland Ballroom and Fillmore Auditorium in September and October of that year. The concerts featured the Butterfield Blues Band, Jefferson Airplane, and Muddy Waters. (The first Blues-Rock Bash was in April of 1966 and featured only the Butterfield Blues Band and Jefferson Airplane.) The badge is 3" across and illustrated with psychedelic lettering typical of the era. This is the "sunshine yellow" variant- the badge was also made in a tan variant.

This rare badge comes to me from the collection of Sandy Gibson, musicologist, and former director of publicity at Atlantic Records.