L. E. Smith Glass Co. - Bicentennial Carnival Collection, 1975-76
Courtesy of Glass Paper Fanatics
L. E. Smith made various items to commemorate the U.S. Bicentennial in 1976, featuring the American Eagle. This page shows the Collection in a light purple / amethyst colour, and they were also made in blue (as well as various non-iridized colours). The ashtray is also found in Smith's "Gold (Amber)" colour.
They pieces are 'S' marked.