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Gold Hallmarks: How to Know What Your Jewellery Really Is - Gold Smart
Simple Gold Hallmark Guide
Hallmarks of Italian silver of 20th century
Antique and Vintage Jewelry Maker's Marks: A Collector's Guide - Invaluable
What would a symbol on a gold chain necklace clasp mean? It is an uppercase letter B with 2 circles, a small circle, and a larger circle. It also has on the