Czech cased spatter glass shade

This shade is 6.5" x 4.5". It has an inner layer of white glass, a middle spatter layer of red, orange and brown and a clear outer layer. The top and bottom are ground. It is substantial but not overly heavy. It is not signed or marked in any way. It is very difficult to photograph in artificial light. I may try it again tomorrow in natural light. The first image is closest to the real colors and I had to use a flash to get that image. I had been looking for a shade with a little more pizzazz for my bedroom wall light and found this at a thrift shop a couple of years ago for $1 and figured it was probably Chinese. I haven't been able to find anything like it since. Now I am wondering if it might be Czech? Calling it Bohemian to catch the attention of folks who may be filtering on that category.

Tonight, I found a link at WorthPoint with three identical shades that sold on ebay and a description which says these are "probably" Czech and dates them to the 1960s... It looks like the ebay seller also had trouble getting decent images...

https://www.worthpoint.com/worthopedia/3-vintage-1960s-cased-czech-art-glass-lamp-shades