Vintage sterling silver Tiffany & Co. 1837 padlock necklace on a 15” chain

Authentic Tiffany & Co Heart 1837 Padlock Necklace this is for the 15” chain and pendant only. Both chain and pendant are original Tiffany & Co.  Pendant measures 0.85" including bale. There is a spring mechanism in the pendant to hold it securely. Still works flawlessly. The entire piece is in Excellent condition. Unfortunately, I no longer have the box, pouch or paperwork. They were lost in a house fire three years ago. Original price was $935.00 new and the same necklace sells used for $600. My price is firm, no negotiating the price listed on post.