Tiffany & Co. Heart "Tiffany Blue" Enamel Key Necklace Great for Valentine's Day

Tiffany Large heart key in sterling silver with "Tiffany Blue" enamel. Authentic, with pouch and box (box top is a bit soiled). Key measures apx 2 inches, chain is 16 inches long. All together, the necklace hangs at about 20 inches. Fantastic condition. I inherited this item and it may have been worn only a few times. Very pretty! Thanks!