one problem is that dollars don't have a 2X2 big enough to fit the coin and airtite in it, it works with all other sizes though...
One way I have seen it done is to put the coin that is already in the airtite inside of a 2 by 2 (mylar and cardboard) holder and you can then...
I am sure it's ok, I bet it is bestowed with good luck to the finder. cool find!
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