Here is the complete picture. The signatures are a little bit "all over the place" which makes it somehow peculiar.
Its tough to see clearly the autographs on the dark portion of the photo. Keith Richards look authentic. Try taking a close up photo of each autographs.
Thanks for your suggestions. It is not so easy to frame a single signatures since they are all over the postcard. I have tried the best I could. Please check again.
and here is the rest...
Just wanted to revive this discussion. I will probably get some other vintage Rolling Stones photos to upload it here.