Original color 4.5 x 7.55 advertisement postcard for a show by Big Brother and the Holding Company, Iron Butterfly, and Booker T and the MGs, signed in felt tip by Steve Cropper, Duck Dunn, and Booker T of Booker T. and the MGs, Sam Andrew, Peter Albin, and David Goetz of Big Brother, and Iron Butterfly’s Ron Bushy. In fine condition. RRAuction COA.
