This type of decor is relatively common and likely made by many houses in a range of colors. They are extremely difficult to attribute accurately to any house, unless it is done through the use of a unique shape. Exceptions to that would be examples marked with the arched mark routinely attributed to Kralik. Most examples are routinely classified as "unknown". This piece could be Kralik, Welz, Ruckl, or a variety of un-named companies....
Craig