Original 1st printing 13 x 22&1/4" concert poster for Jefferson Airplane appearing with the Crazy World of Arthur Brown and the Joshua Light Show at the Fillmore East in New York City on 5/3-4/1968.
Art by (and SIGNED in black flair pen by) David Edward Byrd, image is # 6 in the Bill Graham/Fillmore East series and is featured in the Art of Rock on page 158 (plate 2.92).
Medium flat vellum stock poster is in absolutely fantastic near mint (B+/A- to A-) condition; aside from a tiny stain and a small bend in the bottom left corner, it's just about as bright/crisp an example as you can ask for.
This poster was signed by David at the Bethel Woods (NY) Rock Poster Fair on 4/28/2012. Here's "White Rabbit" from the "Live at Fillmore East" album;