1st Tiffany Purchase - Narrow Chain Bracelet Silver / 18K Gold - Authentic?

[doctor_paul]

I have browsed their stores a few times but finally made my 1st ever Tiffany Purchase, which was on eBay last night. It's a 1837 Tiffany Makers Narrow Chain Bracelet in Sterling Silver and 18k Gold in size Medium. The seller has listed it as brand new with tags. When I asked about authenticity, I was told that there are no authenticity papers but they are a consignment company and this is from one of their premiere clients. Any thoughts on the authenticity would be greatly appreciated, here's the link with pictures: https://www.ebay.com/itm/Tiffany-Co...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649