There is so much to learn about American coinage! It fascinates me to no end!!! The commemorative coins, the old ones most especially, are very special coins. There are lots of modern commemorative coins now. I am sometimes tempted to subscribe to that series from the US Mint, but I will never do it. It is not my focus. I am sure you know Salivate Metal. He is subscribed to that program for many years, and he has an extensive collection of modern commemoratives.