Vintage glass door knobs 3 purple lavender amethyst 8 point antique small large

Description

Gorgeous!
NO CHIPS!!  NO CRACKS!!
One large and two smaller. No "through the door" hardware. Just the knobs and the metal part on the back.
They are all the same shade of purple. Not sure why there is only one of the large ones.
The large one is about 2.25 inches across. The smaller ones are about 1.75 inches across.
I don't know anything about glass knobs other than what I have read on eBay. I got these at an estate sale.
I also have 2 clear glass knobs for sale. I will combine shipping.