1967D Kennedy half-dollar DDO

This coin is a doubled die obverse coin that may match http://www.pcgscoinfacts.com/Coin/Detail/391390 , in my opinion. I’ve taken the most descriptive photos I can. I believe this coin is possibly 90% silver, however this particular one weighes 11.31. I think it just weighs less but has mostly silver composition. Any thoughts on value?

 

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It's a normal coin.

 

Why exactly do you think it is 90% silver?

 

It looks the same on its side as other closer year coins. Much different than the nickel copper clad half dollars on their side.

 

I corrected the link. Sorry about that.

 

It is a 40% silver coin such as they made from 1965-1970.

 

It's still a normal coin. It's not 90% or a DDO.

 

Ok. What makes it not a ddo?

 

The 90% weigh 12.5 grams and the 40% 11.5 grams.

 

Nothing is doubled on it. Perhaps some MD.