I wonder why his TTM takes so long. I'm kind of worried since he didn't sign your photos because i was going to send him a pic of him as Mr./Mrs. Potatohead already signed by Estelle Harris.
I'm no expert, but based on what I've seen, this is looks pretty authentic. Don has some type of a palsy and his signature is often very shaky. In the past, people have sent him photographs and received what are clearly secretarials back within a couple of weeks. This, given that it's one of Don's photos & took such a long time, has the signs of an authentic signature. But that's just my two cents.
Thanks Eric, kind of what I was thinking. Based even on his
age alone, someone over 80 is going to have a pretty shaky
signature... unless his sec is 80 too.