Closeups of the signatures would be of assistance.
Looks to be the work of Beatles road manager, Neil Aspinall. He signed hundreds...if not thousands of items on behalf of The Beatles...
Not one, but two different coloured felt tip pens.
I believe that the Ringo signature is authentic. The rest appear to be by Neil.
The signatures are nearly indecipherable (washed-out), it's hard to tell what's legit and what isn't.