What is a doubled die coin?
I recently encountered a term called 'doubled die coin' and I'm not quite sure what it means. Could someone explain to me what a doubled die coin is and how it differs from a regular coin?
What causes a coin error?
I'm having trouble with a coin-operated machine. It seems to be giving me an error whenever I try to insert a coin. I'm wondering what could be causing this coin error and if there's a way to fix it.
How do you know if a coin error is worth money?
I have a coin that appears to have some kind of error on it and I'm wondering if this makes it valuable. How can I determine if my coin with an error is actually worth any significant amount of money?