Is it the lid to a decanter?
Then it lead me to perfume vials!
Em ... you are the BEST googler EVER!!! I think you figured it out. I'm so impressed!!! Woot!
I bet that's what it is and it's just missing the lid!
OMG i bet sooooooooooooooooooooooooooooooooooooo -- I was just about to put it up on the antique road show site... that makes A LOT OF sense --- my grand mother LOVED perfume!!!
I posted it up on the antique road show page and still havent gotten an answer. lol of course my friends and family are having as much fun as you all have had.... lol