1921 Mercury dime - rotated. Value?

I've got a 1921 Mercury dime in fair to good condition. Plenty of wear, but date is clearly visible and you can see it's got no mint mark. The obverse and reverse are offset from each other maybe 15 degrees. Enough so that it's obvious when you flip it over. Does this rotation add any value?
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President, Racine Numismatic Society 2013-2014; Variety Resource Dimes; See 6/8/12 CDN for my article on Winged Liberty Dimes; Ebay
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