So I buy the following postcard autographed by Muhammad Ali on eBay in a lot with some other items:

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I submit it to PSA/DNA who come back and tell me it's not a genuine signature, it's an auto-pen. So, what are the odds I find another one for sale on eBay with an identical signature (though at a different slant)? eBay Item #251302411990 -

Name:  Ali Postcard eBay.jpg
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Close-ups:

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Those guys at PSA/DNA know their stuff!