What age is your nephew? The first thing he should learn about coins (even before grading) is to keep his hands off the faces of the coins....
And...it's even attracted to a magnet!!! I have a silver one too.
Away from home visiting, but will try when I return.
I will concur that pure solvents should not hurt the coin. Hot water, alcohol and then acetone and some xylene if you have it.
I believe mine is original and is XF to Unc. The toning has to be seen to be believed! [ATTACH] [ATTACH]
So, should I cash mine in... [ATTACH]
For coins like these, elementary steps would include seeing if they are magnetic and seeing if they are the correct weight. After that seeing if...
Several threads have posted an illustration, use the search function and you should find it.
...in my dreams. :)
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