1776-1976 Bicentennial 25C Missing Clad in both sides

Here are the pictures of my 1776-1976 bicentennial quarter missing its clad layer on both sides? it weighs 5.44 5.43

 

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It's corroded. When a cupronickel coin sits in acid, the nickel tends to dissolve away more quickly than the copper. That slightly reduces the coin's weight, and what's left is more copper-colored.

A quarter that's truly missing both outer clad layers would weigh closer to 4.76g, and would be noticeably thinner and more weakly struck than a normal quarter.

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Sorry but is not missing the clad layers. It’s suffering from environmental damage. Someone found this coin, after it spend time in the dirt.

 

Hey! I found one Metal Detecting that looks just like this one. What are the odds?

 

If this coin were missing both clad sides (incredibly rare) all that would be left is a copper core. The weight would be 5.2. The pressure from striking this coin without both pieces of the clad sandwich bread would not create the normal details you see on your coin, but the image and lettering would be all mushy.
Your coin is rusted. Environmental damage.