From the estate of an autograph collector (also a Beatles fan):
An apparent autograph by George Harrison on a 5x7 clipping of a black-and-white photo, presumably clipped from a book or magazine about the Beatles. (The paper quality resembles that of a book more than a magazine.)
There are raised pen/writing impressions on the back, so the signature presumably was added to the paper (not printed as part of the original publication).
I'm just going to post two photos now in case this is a known facsimile, then I won't be wasting people's time. But if there is consensus that this item is worth exploring further, I can post close-ups.
Let me know your thoughts.
Thanks!
Photos of front and back of clipping (ignore my watermark; I added it to discourage copying):

