sadly, eastwood doesn't sign TTM anymore and hasn't in years...everything you get is usually secretarial or autopen...there have been tons of discussions and pics to support it on
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that's not to say you can't get a legit sig in the mail...but the odds are very slim to none.
It's still cool, you get a nice looking pic and something directly from his office, just don't think it's real and if you have something already signed legit by someone else, I wouldn't mess it up thinking you will get a real sig back from Clint.