Don't let valuable coins become worthless due to a simple mistake.

Time to dispose of your childhood coin collection? When I was growing up in Zurich, the Swiss authorities stopped using silver to mint the franc, and instead switched to a base-metal alloy. It was ...

This is the Austrias Maria Theresa Thaler. I like to call it the ancestor of dollar coins used around the world. One ...

For the past century, one of the most valuable collections of coins ever assembled has been hidden away in Denmark, its location known only to a handful of designated stewards. The situation was ...