Showboat Casino-Hotel, black amethyst ashtray

Black amethyst glass round stacking ashtray from Showboat casino and Hotel, with white lettering .Opened in 1954 downtown Las Vegas, by 1979 it had the 3rd largest bowling alley in the US. White lettring says Fun for everyone Bowling- bingo- dining Las Vegas Nevada. 3 1/2" diameter,smooth bottom. Perfect!