Crystal box with silver lid from the 1920s

Length 23.5 cm. Width 7.5 cm. Height 5 cm. Stamped with Czechoslovakian master stamps from the period 1921-1929 for a mintage of 800. We have not been able to identify the master stamp. The box is cut with a large many-pointed star below, flower tendrils on the sides separated by close diamond cuts. Lid and box are in very good condition with no dents, chips or cracks.