Topic: Identification needed of unusual art deco or art nouveau-style vase

[Luckhoff]

I have an unusual, frosted green glass vase I need identified and valued. I bought it second-hand about two years ago from someone in Sydney who was selling his mother’s goods.
 
It is an oval or elliptical, frosted, pale green, pressed glass vase, decorated with eight raised leaves, and looks as if it is from the art nouveau or art deco era. It is has no makers mark. There is a faint seam or join running up each side. Along this seam there one  2 cm crack like mark  which feels rough, which you can see in picture 0170. (The picture exaggerates the seam mark.) This mark is on the underside so is hidden when the vase is on display. The vase is completely water tight and there are no leaks.
 
Though I have searched widely on the internet, I have not been able to find anything similar online. The vase is 9cms high by about 15 cms across at the widest point. The leaf-shaped foot is 7.5 cms across at the widest point. The leaf-shaped mouth is 8 cms across at the widest point. The vase is very tactile and pleasing to touch with its raised leaves. There is one tiny air bubble about the size of a small grain of rice in the glass and a couple of minute pin head size bubbles.
 
Please could you let me know if you have any information about:
1)   what period this vase comes from and whether it is art nouveau, art deco or some other style
2)   who manufactured it
3)   how common or rare it is
4)   what its current value is
5)   how much it would be likely to sell for.

I would love to find out more about this vase.