This is a Bohemian Czech art glass vase that dates to around 1918 to 1938. The vase is stamped on the bottom “Czechoslovakia.”
The vase is 7 ¼” high and 5” wide at the belly.
The glass is white opaline with applied iridescent colors. The interior at the folded down mouth is a light blue. The blue extends onto the outside body in lines. The iridescence adds a mottling effect of large circles in a light brown color, with shades of pink on the underside, perhaps oil spot. The coloring choice is unusual for Bohemian glass.
The pontil is round, slightly indented, and polished smooth.
There are no chips, nicks or cracks. There are some indentations in the glass due to the glassmaking process. The edge of the lower mouth feels slightly rough, and this is due to how the outer glass meets the inner glass, if that makes any sense, and not due to chips or nicks. It looks like the colors are faded in areas, but that is how it is supposed to be.
You can see your fingers through the glass when you hold the vase.