Here is a Tiffany & Co Platinum Lucida Wedding Band Ring.  Made from Solid Platinum 950.  It is a size 8.5, and is 4.5mm.  Hallmarked Tiffany&Co, PT950.  This ring was just polished and returned by Tiffany & Co!  Perfect Condition, and it comes with a nice jewelry ring box.  Retails for $1,775 + Tax.