Original 1st printing 14&1/8 x 22&1/2" concert poster for Iron Butterfly appearing with the Steve Miller Band, Blues Image and Pacific Gas & Electric at the Swing Auditorium in San Bernadino, CA on 2/15/1969. 

 Designer unknown/not credited, thick flat index stock poster is in good/decent (B/B-) condition; toning, tack/pinholes/wear in all four corners (all are reinforced on the reverse with clear tape), a few stray areas of surface chipping, a series of tiny thin horizontal roll/stress bends, edge wear (a few tiny tears/nicks, etc.), a hint of curling and the bottom/right edges may be slightly trimmed (I can't confirm or deny, but the margins are a bit uneven), but overall it still looks pretty nice.

 A VERY cool-looking low-run "oddball" Southern California concert item with a really superb graphic.