I thought this was interesting

[SilverFinger]

An old Time magazine article about the changeover from silver to clad coins

http://www.time.com/time/magazine/article/0,9171,833731,00.html?promoid=googlep

 

[ClonedSIM]

Huh! I didn't realize the US sandwich were the world's only 2-colored coins at the time. Nice find!