The first medallion Ken Hopple pressed at the Nevada State Museum was a commemorative medallion for former Nevada Speaker of the Assembly Joe Dini in the fall of 2002.He's also pressed medallions for most Nevada towns, the Nevada Legislature, and requests from special-interest groups."We use different metals to press the medallions," Hopple said. "Brass, copper, silver - I have done gold for the Nevada Legislature - silver clad and nickel."Hopple, 61, was pressing a brass medallion recently for Nevada's 74th State Legislature - 2007. The front of the coin shows a tule duck decoy, and the Nevada State Seal on …