Hmmm, hard to tell. Maybe Harrison? Too bad they didn't have HD back then. In McCartney's doc. "The Love We Make," there's a scene where graphers are chasing him while he's in a taxi. Someone tries to stick a pick guard through the window, McCartney doesn't sign it saying, "That's commercial." And that was 15 years ago. He might sign instruments for charity now, but can't envision him signing them for the public.