Can't identify this vase

Have you ever tried finding out something and just can't get to the bottom of it and then it drives you crazy?? I have spent more time on this than you can imagine...

These vases are really heavy, no gold foil sticker, no etching. The photos aren't the greatest ... I have a hard time taking pictures of crystal.

I've added a couple of pictures of the bottom. Both are smooth and translucent.

If someone could point me in the right direction, I'd sure appreciate it.