AUTHENTIC Tiffany and Co. Older Glasses

AUTHENTIC Tiffany and Co. Glasses. Small Frame, Vintage “Please Return to Tiffany’s” Decorative Detailing on The Glasses VERY slightly used and WELL LOVED! I decided to sell them because I hardly use them! It’s someone else’s turn to love them!! The case is in black and says “Tiffany and co” on the top (though it’s difficult to see in the pictures) How can you tell it’s authentic??? In one of the pictures included, you can see actual the frame number. (It may be difficult to find online as these are older model glasses)