Darren,
The first three Nolan Ryan signatures are secretarial, no question. Nolan is a huge focus of mine and I have gotten him in person under many different circumstances. These were most likely signed by an Angels clubhouse boy, as I recognize the handwriting. This was fairly common for this era.
Here are three examples of secretarial signatures of Nolan from the same era with the Angels. None of the characters in the inscription or the signature on the ball match Nolan's handwriting. BTW, even PSA, in all their infinite wisdom, frequently get these wrong. The slabbed signed 1979 card of Nolan is an especially brutal fake. How did this ever get passed? Geez!
The The last example is Ryan's real signature circa 1972. This is from Ryan's 1st contract with the Angels and just sold in the REA auction.
I hope this helps!
No comment on any of these others, as I don't recall getting any of them.