I have a gold pin that was my mother's. It is a pin yet it has the loop on the back to make it a pendant - but doing so would have it upside down from how they are usually shown. This makes me wonder. The only thing I know for sure, is that the Lily of the Valley was my mother's very favorite flower and fragrance. They grow here still - in the old flower beds surrounding the cabin front porch. She said it was her father's favorite flower. The pin must have been a gift to her and I'm sorry I never asked who gave it to her before she died. After some research I'm more befuddled. The following three paragraphs are taken from different internet sites.
Lily of the Valley symbolizes sweetness and humility and “You’ve Made My Life Complete” is the hidden message connected to the flower.
"Fleur de lis is French for “flower of the lily” or simply “lily flower.” I have no real notion of the symbolic meaning of the fleur-de-lis, other than that it is associated with France and, in a nod to the French origins of Louisiana, it is the logo of the New Orleans Saints NFL franchise. Not only does the fleur-de-lis pre-date the establishment of France, it goes back about far as you can go, to the first region permanently settled after the Flood: Sumer, in Mesopotamia. - It is reported to have a dark history."
"A traditional fleur-de-lis, which means "lily of the valley" in English, has many meanings. The most common is a representation of French royalty which symbolizes life, light and perfection. There is no traditional symbolic meaning, though, for an upside down fleur-de-lis."
"The fleur-de-lis symbol evolved from the ancient symbol of the bee and represents the same thing: the "royal" families. It was and still is used extensively by the blue bloods."
Well, I'll just say it was a gift to my mother and represents her favorite flower and fragrance. I too, like the fragrance - very much! As for wearing the pin upside down - well, maybe.
I scanned the pin and the backside isn't as clear as I would like, but you get the idea.
Here are pictures of others I found on the internet with the same loop which would cause it to be hung upside down.