This is a lovely antique sterling filigree Vinaigrette by Tiffany & Co. It is 1 3/4" in diameter and appx 1/8" wide.There is a loop added for wear as a pendant but I don't think it is original. There is script monogram on front of LRC?. Condition is very good, it could use clean and polish. The hallmarks on the side are Tiffany & Co. 17596 Makers Sterling M. Dating the piece from 1910 to 1940, I am sure you agree it is closer to 1910!