I'm about to acquire this Beatles photo, and there's a beautiful story behind it.
According to the owner, this photo was obtained by someone after a friendship with Loise Harrisson (George's sister). She sent him this photo autographed by all four Beatles. I just have the pics with a water mark, sorry for it.
I don't know the year or if it's 100% genuine or authentic. I'm also sending the letter, which, in theory, confirms that they were writing to each other at that time.
Autopens back to the 1940's or so. It is impossible for those signatures to be anything else. They have different placement, that is all. Photo may well still hold value but as a different sort of collectable. The use of Autopens before this this is well documented. Kennedy, Garland etc.
They "could" also be just prints of an Autopen. They are mechanical and exact to the signatures on your image.