Well if you're thinking Ruby Slipper it's not like one I've ever seen. Usually loaded with bubbles and the surface is full of dimples. I've probably had at least 10 of them and they all had one stand out ribbon W the other side being lesser. Here are a few examples my Friend Terry has sold in the past, I'll try and dig out my pix. Never seen one without a myriad of bubbles inside, you can usually recognize them 10 feet away, an easy I.D.
http://grandpamarble.com/html/gm2016.html
2.http://grandpamarble.com/html/gm2336.html
Looks like they're questioning what it is themselves, I think "Grannycamps" might be one, but the others I question, just as they do themselves.
Never seen one like this, the ribbon and glass color are both off. They even have a ? below the pic