Art Glass Vase Czech?

While I'm posting glass, I thought I would add this vase. Found at a thrift store, I believe it is Italian, Venetian? and sommerso as it has the white glass lining and a layer of clear glass on the exterior. The vase is 7 and 1/2" tall. Set me straight on this if I'm off base. As you can see in the comments, Czechoslovakia is the probably place of origin. I've ordered books from the library already.
Thanks for your comments.