Original 1st printing 13&3/4 x 21" concert poster for 1960's UK folk-rock duo the Incredible String Band appearing at the Fillmore West in San Francisco, CA on 9/10/1969.
Designer unknown, image is an un-numbered single-show/one-off image from the Bill Graham/Fillmore series, falling in between the BG 190 and 191.
Medium-thick flat vellum stock poster is in near mint to excellent (A-/B+ to B+) condition; aside from a nearly-invisible set of tiny pin holes in the four corner tips, a trace of handling and a VERY light set of tape pulls on the reverse, this example is just about as sharp as they come.
REALLY nice-looking example of a somewhat unusual mid-week Bill Graham/Fillmore poster.