I ran a PSA/DNA quick opinion on this and it received "Likely Not Genuine." I have compared this to other authentic examples and there are some differences. The name Martin and his Initial "L" are very close to each other and it appears like if he crossed The "T" with the loop of the "L" which I have never seen and also the "r" in Jr. shows some inconsistency. Sold for less than 1 grand! This seller also has a book signed by him with an almost identical signature as this one.