At this point, I am really not sure which of my polishes would fall into the category of "oldest untried." I think it is Essie Masquerade Belle. This polish came out in the Winter of 2010. I remember this polish well because it was around the time that I discovered Essie polish was was buying them up! I attempted to obtain every polish in this collection, and I think I did. I have to take another look!
So here is Masquerade Belle, it is described as "fascinating, mysterious and seductive, this black ruby sparks the imagination and inspires intense devotion."
I applied 3 coats, due to the jelly like finish of the polish.
I can't believe that I have never used this polish! It is gorgeous!!