
I'm sure the apperture of the bottle I had my "experience" with looked just like that. It's all packed away but I might be able to check the pics I took. The stopper were slim, with that concertina-like plastic surround to them.
I wasn't
that fond of parma violets, and after I covered myself with it, I had to sit in the enclosed space of the car for a 5 hour journey home, suffering from the stink.
I have gone right off perfume of any sort, permanently.
Getting back to your piece, when you hold the thinner parts to the light, to try to see through it, is there a "fire" in the glass? A bluey, yellowy and perhaps even reddish in the centre glow (sort of pale sunset-y colours).
If there is, it's opaline glass.
Thanks for your input, Frank.