This is a Very Rare First Print “A” Grateful Dead and Jefferson Airplane Concert Poster. Bill Graham Presents in San Francisco. Aug 12th & 13th 1966. Held at The Fillmore Auditorium SF. Artist’s are Wes Wilson and Herb Greene. There are Two Variations of the Pre-Concert Printings. This is a Pre-Concert First Printing “A” Poster #BG-023-PO. The “A” Poster is on Coarse Dull Stock on a Lighter Purple Background. The Back of the “A” Version will Show Florence When Put Under a Black Light, as Seen in the Pictures. It Measures Aprox 20 3/16″ X 14 1/4″. It’s in Near Mint Condition. Very Rare and Hard to Find this Nice.