Here is a non-matching set from pre- and post-1966:
A matching set from before and after:
Another non-matching pre- and post- set:
And another matching set:
Notice the same line of discoloration beside the right eye in each, and the exact same curve of the outer eyelash on the right eye of each.
Here are all 4 of those Beatlemania Pauls lined up together, and they're all different!