As with just about any asset, a coin’s value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

Sometimes planchets for one coin denomination are fed into a coin-stamping press equipped with dies of another denomination. This results in a coin that has been stamped with a design intended for a ...

A reverse proof die meant for special coins was mistakenly used on regular circulation pennies. You can spot it by looking at the spacing between the letters “A” and “M” in “AMERICA” on the reverse ...