I came across this among my stuff. What is it? Is it worth much? One side shows an image of an 1878 US coin and says "Las Vegas Dollar;" there are gambling symbols and map of Nevada on lower part of the side............The reverse side shows the Convention Center and says at the bottom: copyright "Coins and Gifts International.", and has names of Las Vegas casinos at the time (Castaways, El Morocco, etc.)........... .... Was it used as a slot machine token? Or just a souvenir?

Robert