take refuge in the knowledge that more pedestrian 50-cent coins may still be worth in excess of their face value. For example, a JFK half dollar minted between 1965 and 1970 has about 40% silver ...

The 50-cent coins are a different colour - silver - to their 2-cent counterparts. So, the mix-up led to the unusual creation of a copper-coloured 50-cent coin. One eagle-eyed person spotted the ...