Original 1st printing 12&7/8 x 19" concert poster for Iron Butterfly and Taj Mahal at the Magic Mushroom in Studio City, CA on 12/20-22/1967. Design by Bob Masse, medium flat index stock poster is in absolutely stunning near mint (A- to A-/B+) condition; aside from a couple of really minor scattered handling/pinch dings and a couple of tape marks and tiny pulls on the reverse, it's as crisp/bright as you can hope to find... a GORGEOUS example of this ultra-scarce oddball Southern California Masse poster with a very pretty psychedelic design.