Kralik - Cased Cherry red

This is a red cased Kralik from around 1925-1935. I has a simple construction but must have been difficult to achieve. The glass is triple layered with a thin white glass layer in the center. The wafer-thin white magnifies the intensity of the red. It is amazing to me how they achieved precise thickness to each layer. Marked Czechoslovakia in an arch shape (when they are marked).