Vintage order Blue Controlled Bubble Blown Glass Covered Perfume Bottle made in Czechoslovakia

This is vintage blue controlled bubble blown glass covered perfume bottle made in Czechoslovakia. Probably made in 1918 - 1938. The art glass bottle, hand blown, has round shape. The mushroom-shaped stopper is rich blue. On the bottom etched Czecho-Slovakia.
Dimensions: 4" tall x 4" at widest point. The bottle is in good vintage condition. There is a roughness of the glass on the neck order of the bottle, a slight damage of the glass to the top line probably occurred during the manufacturing process