This is a set of 4 juice tumblers made by Fostoria in the USA. Each is stem #4020 and they are Amber or Yellow in color with a clear base. The bowl is plain with a bell shape and the color is pale amber to dark yellow color.
This set of 4 Fostoria 4020 ebony black base tumblers glasses from the 1930s exudes an Art Deco style.
There is on tiny chip on the top of one glass as shown in the last 2 photos.