This belongs to Tiffany and has not been made into a font for public use.

There have been all sorts of conversations about it over the years. For their website they've used a font named Sterling (I still have not looked at it). There are some folks who believe it was made from Baskerville Old Face. And the list goes on.

I'm sorry.

P.S. I just noticed - we've been here before: http://www.dafont.com/forum/read/107093/font-name-for-tiffany-and-co

Goood