Gerhard T' Hooft (1946- ) Dutch physicist who shared the 1999 Nobel Prize in Physics.
Photo on the right is in the files of the "PADAH" (Professional Autograph Dealers and Auction House Library.)
Photograph on the left, recently purchased on eBay by a collector. Seller is advised his photo has been signed by the autopen machine. Seller responds all the ways to detect how the signature in gold ink on his photo is genuine. The seller holds the position the signature is genuine. The seller also advises that the buyer go to an autograph expert they recommend. The seller, on ebay, states they do not sell non-genuine autographs, including those signed by the autopen machine.
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