Antique and Vintage Jewelry Maker's Marks: A Collector's Guide - Invaluable
Costume Jewelry Marks – Kovels
List of Costume Jewelry Values, Designers and their Marks by Dr. Lori - YouTube
I'm just wondering if anyone knows this jewelry makers mark? I've tried ecc, cec, cce & so on. I have 2 vintage costume jewelry earrings that have these marks. Thought that info