Birmingham hallmark date letter “O”: which year?

The letter O on a Birmingham hallmark can be any of these years, depending on its case and typeface: 1786–1787 (uppercase roman); 1812–1813 (lowercase roman); 1837–1838 (uppercase gothic); 1863–1864 (uppercase roman); 1888–1889 (lowercase gothic); 1913–1914 (lowercase roman); 1938–1939 (uppercase roman); 1963–1964 (uppercase cursive); 1988 (uppercase roman, unified cycle); 2013 (lowercase roman, unified cycle).

Before 1975 the letter changes in July, so most letters span two calendar years. Compare the case and typeface with the table; the letter alone does not settle it.

Candidates for O at Birmingham

Years	Letter style	Cycle
1786–1787	uppercase roman	Birmingham cycle
1812–1813	lowercase roman	Birmingham cycle
1837–1838	uppercase gothic	Birmingham cycle
1863–1864	uppercase roman	Birmingham cycle
1888–1889	lowercase gothic	Birmingham cycle
1913–1914	lowercase roman	Birmingham cycle
1938–1939	uppercase roman	Birmingham cycle
1963–1964	uppercase cursive	Birmingham cycle
1988	uppercase roman	All UK offices, from 1975
2013	lowercase roman	All UK offices, from 1975

Narrowing it down

Other marks and features on the piece can rule candidates out: see dating jewelry by construction features and the other UK hallmarks.

The letter O at other offices: London, Sheffield, Edinburgh, Chester, Glasgow.

All Birmingham cycles

Frequently asked

What year is the letter O on a Birmingham hallmark?

It depends on the shape of the letter: 1786–1787 (uppercase roman); 1812–1813 (lowercase roman); 1837–1838 (uppercase gothic); 1863–1864 (uppercase roman); 1888–1889 (lowercase gothic); 1913–1914 (lowercase roman); 1938–1939 (uppercase roman); 1963–1964 (uppercase cursive); 1988 (uppercase roman, unified cycle); 2013 (lowercase roman, unified cycle).

Sources

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