I have a 1991 Nolan Ryan Topps 40th Anniversary
The card that show's 5000k's has his R in Ryan defect or error cant find any documentation! 

1
The card that show's 5000k's has his R in Ryan defect or error cant find any documentation! 

Comments
Looks like a print defect to me, no added value.
Its a common print defect known as a "fish eye"
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