As much as I love researching this vase, I'm ending up rereading the same information.
There's so much going on in this vase and has attributes that are associated with several different periods, manufacturers, patterns, etc. At least to me it appears that way, maybe you will have a different more clear cut option. Thanks!
You won't be able to see it under the photos, but in bright light there is a faint iridescent like color that shines through, mostly towards the belly/base of the vase. The colors include green, blue, pink, and gold or yellow. The colors that shines through are almost entirely only on the intricate patterns making the designs really stand out from the glass. Almost looks like it's sparkling. In some of the stars, it appears the color has wore away.
There are 16 diamond shapes with a hobstar (if its a hobstar) in the middle that wrap around the belly. The patterns I think I identified on it are strawberry diamonds, zippers, 3 pronged fans. I am open to correction.
I haven't been able to find any vases with the waterfall necks/lips, but only ones slightly similar.
Anything you could tell me would be great! If you'd like to see any more photos or have any questions feel free to write me!