Any information on this glass slipper please

Hi everyone. Please advise on time period and any other information on this dark green glass slipper.
Thanks in advance.
Elsa

 

I know Fenton did this design with the cat head. Others may have copied it.
I think I see a light Fenton mark just in front of the heel.

 

Fenton Glass Daisy & Button Cat Head Shoe

 

As a seller, unless there's a clear Fenton mark or label, I usually don't specify a manufacturer on these as their are abundant copies. Most sellers list Fenton because it attracts the most attention. Selling price on unmarked examples is usually under $10.

 

The origin of this shoe was first in the 1880's. Pieces from that mold, and other molds similar have been made almost continuously until the present. Yes, Fenton made them, but because of the mass of production, unless one can document a particular color (and this applies only to a very few colors) can any value be ascribed to them. They are fun to collect, some collectors have hundreds, but the manufacturer is almost always unverified.