I am pretty sure that this is not a Pre-Print. I got the same photo and very similar signatures, but the signatures have very slight variations. Like what you expect from it being signed by hand. I believe this is an authentic autograph that was probably pre-signed in a group (for staff to mail out as requests come in) but it is not a pre-print. It is a signature in live ink, and I'll guess authentic. Congrats!
I agree. I've looked at two different examples posted on here. Both look similar, but have noticeable differences that would not be there if it were a copy, or by autopen. Congrats!!