Hi Max and Della,
The base on my piece is flat, but with a slight rippled appearance. The glass is a lot thicker than the one you linked to Max, and the red is just so vibrant, even though the red area of the glass is onle a mm or 2 thick. It is the clear outer casing that is aroumd 9mm thick.
I'm sure it is modern, too. Would you be able to post a pic of your Polish leopard vase, Della. Sounds fantastic.
Thanks,
Beryl