This is designed for antique & reproduction lamps that also use a lamp chimney, so it is open at the top. This is not designed to hang from a fixture with set screws. Nice Patterned Glass - This is blown glass and there are very minor blemishes from the glass-blowing production, such as small air bubbles.
I tried to photograph an example, see photos provided. It is New, Old Stock. It was made in the 1970's and it has been in storage. Anything like these that would be made today would be stained.
This is the old formula Amber Glass, not stained. Please view the picture that I have provided. I do consider the picture to be part of the description of this item. It will be double boxed to avoid breakage.