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Permalink Reply by Mike Kaminski on March 14, 2014 at 9:21pm

Ali signed as Cassius Clay, but often making it "Muhammad Ali aka Cassius Clay." His autographs as Clay do carry a premium, but they're not EXTREMELY rare. 

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Permalink Reply by Bradford on March 14, 2014 at 9:31pm

Thanks Mike. How much do you think are they worth compared to about a $400 standard Ali signature?

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Permalink Reply by Mike Kaminski on March 14, 2014 at 9:42pm

Not really sure man, but if a standard Ali glove goes for $400-600, a one signed with Clay is easily $1000+

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Permalink Reply by Bradford on March 14, 2014 at 9:45pm

Yeah...well this one is on a card not a glove or picture. Some people value his signature according to what it's on.

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Permalink Reply by Al on July 21, 2020 at 12:52pm

If you find 5 vintage Clay (circa 60-64) signatures in auctions throughout a year then you've done well 

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Permalink Reply by terrier8HOF on July 21, 2020 at 1:12pm

are you sure this one is authentic?

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Permalink Reply by Owen Smith on July 21, 2020 at 1:20pm

I was going to say the same thing terrier8HOF.

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Permalink Reply by Al on July 21, 2020 at 1:23pm

I think he did sign some proline cards, but some are fake proline cards and pre-printed signatures. Personally I wouldn't touch them 

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Permalink Reply by terrier8HOF on July 21, 2020 at 1:43pm

This one looks way off to me that is why I questioned it

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Permalink Reply by Owen Smith on July 21, 2020 at 1:45pm

It looks bad to me too unfortunately.  

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