I'm not sure work hardening would have much to do with dissolution rates.
Hey @Insider ever have any of these to grade? What's your weirdest grading experience?
Nickels are not clad. This is environmental damage
Sometimes takes time to reply, for instance I notice it took me 27 minutes to respond to you.
If the fields were covered with wax paint, etc. and then the die sandblasted the devices would receive the frosting rather than the fields.
Soaking in various oils is common for ancients to remove corrosion. The oils also seem to condition the copper and protect it till they evaporate.
Is this a contest?
Interesting, I just bought a set, one of each.
Calm down
Looking back at the coin, it kind of looks like the other O in EXPOSITION is starting to fill at the top...I should check mine.
Is your dad Japanese?
It is a very nice looking coin, and I am sure that whatever happened to the O happened in the mint, so, yes it is a mint error. Now as to whether...
Do you have one? In what? Do you have some pictures of the coins you removed the plating from, I would love to see them.
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