Following the recent and very long discussion about a McCartney book signing, I thought it might be interesting to show how much book-signing autographs can vary, even when done within a minute or two of one another.
Here are two Jean-Michel Basquiat signed books from 1985. The second is mine and the first is one I saw for sale recently. As you will see, one is 36/1000 and the other 38/1000 but there are countless variations between the two that cannot be accounted for by things such as tiredness, awkward signing surfaces - or increasing levels of intoxication(!)


I'm confident that both are authentic and it just goes to show that there is more to autograph authentication than making sure that an autograph looks the same as other authenticated examples. Personally, I find this one of the most satisfying things about autograph collecting.
Does anyone have similar examples of book-signings that were signed at almost exactly the same time but differ so considerably?