At the turn of the last century, miner Joseph Lesher attempted to raise the price of silver by privately minting octagonal Referendum souvenir medal coins with values of $1.25 or $1. They were common in Victor, Cripple Creek, Denver and other places in Colorado in the days after William Jennings Bryan fought unsuccessfully for free silver. Surviving an initial dust-up with the Secret Service, Lesher found a loophole to place them in circulation in...