Pennyweight.

What does the anchor hallmark mean?

Short answer

Anchor: Birmingham Assay Office (from 1773; gold from 1824).

An anchor also appears in American maker’s marks (Gorham): the other marks decide.

The stamp in detail

ItemWhat the tables say
Stampanchor
ClassHallmark symbol
Date clueNot before 1773. The Birmingham office was founded in 1773.

Cautions

Related stamps

Also in this group: lion passant, Britannia, leopard head, rose, castle, crown, orb, sovereign head.

All stamps and the search · UK hallmarks and date letters

Frequently asked

What does anchor mean on jewelry?

Anchor: Birmingham Assay Office (from 1773; gold from 1824).

Is the anchor mark proof of the metal?

A mark is a statement, not proof: it can be forged or struck on a plated piece. An assay confirms it (touchstone and acids, or X-ray fluorescence).

Sources

All sources are listed with the method on the sources page.