Vintage shops Crystal Pillar Fluted Butter Dish

Vintage Pillar Fluted Butter Dish.
This is the most beautiful butter dish I have seen. I have spent countless hours trying to determine its maker to no avail. If anyone else can identify it I would really love to know. I have provided many photo shots with different lighting. Measurements are included in photos.

Condition: Excellent. There shops are absolutely no marks, scratches or damage of any sort. Please also refer to photos as they are part of the description.