Stella Wien - Model 306E - Desider Stern, Vienna (Austria)

The Model 306E was only manufactured from 1950 until 1951.

On this picture taken at a fair, you'll see 2 models at once:

(Did you notice the 2 different Jugs, left a more trapezoidal, right a rounder one)

 

It works on exactly the same way as the Model 305E i presented earlier and uses the same patent registered by Desider Stern (here or here).