Czech Art Deco Tango Glass Vase on Legs

I started buying these vases on tripod legs very early on in my love of Czech glass and recently I have found three more. Some are identifiable many are not. However I think this Tango glass vase is probably Kralik.

Of the three in the second picture the one on the right is in a shell shape generally attributed to Kralik.

The third picture shows the rosebowl and two vases in a décor attributed to Kralik.

Picture four shows the foot clearly. The feet on all the vases have been formed with a crimping tool which leaves a flat surface. All legs and serpents are cobalt.

Height 16 cm./5.25 inches