BEDAT & Co No3 with diamonds

This is gorgeous! My father bought this for my mother. I inherited it when she passed away. But it’s not my style. I have the original boxes and papers and it also comes with two extra links. Signs of wear are light and mostly inside. It was purchased from Goldtinker Jewelers in Red bank, New Jersey. There is a number on the box that appears to be a serial number from there. Although I have the papers, Poshmark will authenticate this item.