Vintage ballpoint signatures, "Stay Happy, Jimi Hendrix" and "Billy Cox" on an off-white 5.75 x 4 sheet, with a ballpoint signature on the opposite side, "Mitch Mitchell." Also includes a white 6 x 4 card signed in blue ballpoint by the Band of Gypsys drummer, "Buddy Miles," and a glossy 4.25 x 5.75 postcard photo of the Experience posing with two topless women on a Hawaiian hillside, signed in blue ballpoint, "Cheers, Noel Redding, Oct. 97." Reverse of postcard bears collector's ink notations indicating that the signature was obtained at a Berlin music club in October 1997. In very good to fine condition, with scattered creasing and a central vertical fold to card, and creasing to lower half of the photo. Consignor notes that the Hendrix, Cox, and Mitchell signatures were obtained on September 4, 1970, at Super Concert '70, a one-day music festival held at Berlin's Deutschlandhalle. The massive event was headlined by Hendrix, and included other artists like Canned Heat, Procol Harum, and Ten Years After. The concert was the second-to-last of Hendrix's career; his final stage appearance was at the Open Air Love & Peace Festival in Fehmarn, Germany, on September 6, 1970, just twelve days before his untimely death. A coveted assemblage of the entire Experience and Band of Gypsys lineups.