Chalet or Altaglass ??

[Ellenshar]

My mother has had this vase for more than 30 years (maybe quite a bit longer).  Everyone who sees it seems to think it is Chalet Art Glass, but there is no marking on it.  I think it might be Altaglass.  Anyone familiar with this type of glass?  I have also been told that the green color is quite rare.

Thanks.

[D&b antiques]

I'am inclined to believe it's chalet. should sell in the $ 50.00 Dollar range.