If you've got a question about coins, and you don't know who else to ask... you're best bet is to go to a local coin dealer or a coin show.

Can't find one of those to meet your needs? Then your next bet is to contact one of the local coin clubs in your area.

Coin clubs are organized groups that meet semi-regularly to discuss the latest about coins, as well as to buy/sell/trade coins with one another.

Challenge coins are not really coins per se.

They are not made by the Federal mints.

And they are not used as currency.

Challenge coins first made their appearance during World War I.