* Assay office reference

Assay offices and their hallmarks

The town mark stamped beside a purity figure tells you which assay office tested the metal. From London's leopard's head and Birmingham's anchor to the Edinburgh castle and the Paris Minerva head, each office has a story and a symbol. This is the full index — every office gets its own page covering its mark, history, and how to read it on your own jewelry.

Published May 30, 2026