Greetings everyone, I'm a newbie to the site and would like and appreciate your opinions on the authenticity of the David Bowie signature on this Merry Christmas Mr. Lawrence movie card. I purchased it from a seller in Canada who inherited an autograph collection from an uncle. That's all I know about it. I've been told that's it's a "superb" example, although I think they just wanted to sell me a certificate, to "I have my doubts ". Please help! Thank you.