I have no clue what kind of glass, maker or pattern this plate is

I found this plate at Goodwill and feel it is something special, but I have spent hours researching it online and cannot find another like it or even a matching center pattern.

I cannot see any kind of signature on it.

It measures 9.5 inches diameter

There are a few air bubbles in it.

If if hold it flat in my hand and flick it, there is a sort of a ring to the tone.

The approximately 1.5 inche clear rim is gently fluted with about 6/8" flutes. The flutes create little slightly bevel-like triangles at the top of the flutes all around the rim.

Then what I will call some kind of "cane" pattern for about 1 1/8 inches

Then there is about a 1/4" depression into the center of the plate

Then what I will call a "Whirling Star" pattern in the bottom center, but it is not like any other Whirling Star or Hobstar pattern I can find.

There is a tiny little star on a button in the very center. The area surrounding the button is beveled, leading into about 3/8" of another design before going into a kind of zigzag cut star that is not really part of the whirling star. It almost looks like it's going in a different direction.

Then we start the whirling star? pattern that has little horizontal bars -- like the Cambridge Glass Wheat Sheaf pattern -- that separate each little bundle in between bigger knife-like cuts. The Wheat Sheafs in a Whirling Star plus the other zigzag star pattern is what I do not see on any other pattern like this. It's a very complicated pattern and it has been driving me nuts.

On the back, there is a round raised beveled foot measuring about 4 3/4" in diameter. The bottom of the foot is very smooth, like it has been ground.

There are four mold marks that extend from the edge down to the edge of the depression. The mold marks correspond exactly with lines on the flutes, so they are hardly visible in the clear area.

There is so much work in this plate, it doesn't seem like it is something run of the mill. Any clues anyone could give me will be greatly appreciated.

Thank you so much.