First off, please forgive the crappy iPhone pics -
Here they are The Beatles!
Tuning up during the final rehearsal on February 9, 1963, before the first appearance on the Ed Sullivan Show.

Close-up of the signatures:

Sir Paul, anyone?

and a close-up of his signature:

All signatures have been guaranteed as authentic. Ive had them so long, I have no idea of the value. They just hang on my wall yeah, yeah, yeah.

