David Powers rare signed John F. Kennedy vintage photo. Powers was a close aide to President Kennedy and served as a special assistant to the President and was known for helping him manage his schedule. Powers was also the first curator of the JFK Presidential Library. He was born in 1912 and passed away in 1998. The David Powers signature is 100% guaranteed authentic and comes with a coa from Vintagegraphs. The JFK signature is just a facsimile stamp. See photos.