Where do I find the current value of a GWENDA cigarette case with what appears to be an enamelled picture on it?

Hello,

Recently I acquired a Gwenda cig/vanity case. It appears to be brass with bordered engine turning to the face and underneath.

Despite looking at over a hundred Gwenda cases. I can't spot the model in question. The main feature is a three dimensional, physical butterfly, with enamelled blue wings and a body shape in a yellow stone of some unknown substance.

I have taken several pix which I will forward to you if you think it may be worthwhile doing so.

Having seen only pictures or slight relief, I am left wondering if this truly gorgeous butterfly is not a Gwenda original, ie, married with super glue.

I would value immensely if, at this early stage, you could hed some light on this extraordinary object.

Yours most sincerely,

James.