Glass Dish With Graduated Bubble Detail

I have this very interesting glass dish with a scalloped edge - almost like a stylized open flower with a raised ridge coming down on the inside at each point where the rim curves in towards the center. The underside of the dish is made up of graduated balls - larger in the center and growing smaller as they come out to the edge. The entire design of the shallow bowl is like a pin wheel. It measures 8" across x 1 1/8" high.

I am hoping someone out there may recognize the pattern and the maker. Thanks in advance.