Nice looking item.
I was recently looking through cut lead crystal on Ebay (eeeek !!) and amongst all the molded wares, some deliberately and convincingly designed to ape cut crystal ( presscut ?) I did see a number of pieces identified as Victorian with simple designs in this swagged design. Now we all know how relaible Ebay ID's are ...but from the number I saw I would say that you are probably on the right lines. I hope that helps a little.
Do you have other lead crystal you can compare it with ?
Is there much age wear to the base ?
It is very very heavy ?
Incidentally, for clear glass, photographs against a dark background (ideally black or dark blue) would give a better indication of the sparkle, clarity and pattern.